A2.

You will create, implement and test a sequence2 class. The material from Ch1 ~ 4 of the textbook can help you tremendously. You are welcome to use more advance skills than the techniques introduce in the textbook to do the assignment.

This sequence2 class is an extension of the sequence1 class which is introduced in Chapter3 of the text book.

Following is an introduction to some files in this program.

1. sequence2.h, the headers file for the new Sequence class is provided. You can start with the version and add your name and other documentation information at the top. If some of your member functions are implemented as inline functions, then you may put those implementations in this file too. By the way, you might want to compare this header file with the first sequence header file (sequence1.h) in the page 128 of the textbook. The new version no longer has a CAPACITY constant because the items are stored in a dynamic array that grows as needed. But there is a CAPACITY constant, which provides the initial size of the array for a sequence created by the default constructor. 2. sequence2.cpp: The implementation file for the new sequence class. You will write this entire file, which should include all the implementations of the sequence2's member functions. 3. sequence_test.cpp: This is an interactive test program that we will use to test the program. 4. sequence_exam2.cpp: A non-interactive test program that will be used to grade the correctness of your new sequence class.

Your sequence class (sequence2) for this assignment will differ from the previous sequence (sequence1) in the following ways: The number of items, which may be stored in the sequence, should only be limited by the amount of memory available on the heap. When new items are added to a sequence, which is at capacity, the size of the data array in which items are stored should be automatically enlarged. Because you are dynamically allocation memory within your sequence class, you will need to define a copy constructor, an assignment operator, and a destructor. The constructor should have a default argument, which allows the user to set the initial capacity of the sequence. There should be a resize function that allows the user to explicitly set the capacity of the sequence.

Once again, do your work in small pieces. And using the interactive test program and the debugger to track down errors in your implementation. If you have an error, do not start making changes until you have identified the cause of the error. When a member functions needs to increase the size of the dynamic array, it is a good idea to increase that size by at least 10% (rather than by just one item). This assignment comes with a CISP430V4A2.zip file. It includes five files (CISP430V4A2Exam.exe, CISP430V4A2Test.exe, sequence_test.cpp, sequence_exam2.cpp, and sequence2.h.) The statexam.cpp is a driver file to find out what score you get for this assignment. The stattest.cpp is a driver file to test the program. The sequence2.h file is the declaration file for the sequence2.cpp file you will implement.

FILES

sequence2.h

// FILE: sequence1.h

// CLASS PROVIDED: sequence (part of the namespace CISP430_A2)

// There is no implementation file provided for this class since it is

// an exercise from Section 3.9 of "Data Structures and Other Objects Using C++"

//

// TYPEDEFS and MEMBER CONSTANTS for the sequence class:

// typedef ____ value_type

// sequence::value_type is the data type of the items in the sequence. It

// may be any of the C++ built-in types (int, char, etc.), or a class with a

// default constructor, an assignment operator, and a copy constructor.

//

// typedef ____ size_type

// sequence::size_type is the data type of any variable that keeps track of

// how many items are in a sequence.

//

// enum { CAPACITY = 30 };

// CAPACITY is the maximum number of items that a sequence can hold.

//

// CONSTRUCTOR for the sequence class:

// sequence(size_type entry=CAPACITY );

// Postcondition: The sequence has been dynamic allocate memories.

//

//COPY CONSTRUCTOR

// sequence(const sequence& entry)

// Postcondition: The sequence has been created by copying from an existing sequence.

//

// MODIFICATION MEMBER FUNCTIONS for the sequence class:

// void start( )

// Postcondition: The first item on the sequence becomes the current item

// (but if the sequence is empty, then there is no current item).

//

// void advance( )

// Precondition: is_item returns true.

// Postcondition: If the current item was already the last item in the

// sequence, then there is no longer any current item. Otherwise, the new

// current item is the item immediately after the original current item.

//

// void insert(const value_type& entry)

// Precondition: size( ) < CAPACITY. if this is not true then increase the capacity by 10%

// Postcondition: A new copy of entry has been inserted in the sequence

// before the current item. If there was no current item, then the new entry

// has been inserted at the front of the sequence. In either case, the newly

// inserted item is now the current item of the sequence.

//

// void attach(const value_type& entry)

// Precondition: size( ) < CAPACITY.if this is not true then increase the capacity by 10%

// Postcondition: A new copy of entry has been inserted in the sequence after

// the current item. If there was no current item, then the new entry has

// been attached to the end of the sequence. In either case, the newly

// inserted item is now the current item of the sequence.

//

// void remove_current( )

// Precondition: is_item returns true.

// Postcondition: The current item has been removed from the sequence, and the

// item after this (if there is one) is now the new current item.

//

//Operator= overloading

// void sequence::operator =(const sequence&);

// Postcondition: The l-value's sequence object is copy to the r-value

//

// CONSTANT MEMBER FUNCTIONS for the sequence class:

// size_type size( ) const

// Postcondition: The return value is the number of items in the sequence.

//

// bool is_item( ) const

// Postcondition: A true return value indicates that there is a valid

// "current" item that may be retrieved by activating the current

// member function (listed below). A false return value indicates that

// there is no valid current item.

//

// value_type current( ) const

// Precondition: is_item( ) returns true.

// Postcondition: The item returned is the current item in the sequence.

// Destructor

// ~sequence()

// Postcondition: release the memory to the heap

//

// VALUE SEMANTICS for the sequence class:

// Assignments and the copy constructor may be used with sequence objects.

//

//void resize(size_type new_capacity )

//Precondition: new_capacity > used

// Postcondition: new space allocated and old space released

#ifndef SEQUENCE_H

#define SEQUENCE_H

#include // Provides size_t

namespace CISP430_A2

{

class sequence

{

public:

// TYPEDEFS and MEMBER CONSTANTS

typedef double value_type;

typedef size_t size_type;

enum { CAPACITY = 30 };

// CONSTRUCTOR

sequence(size_type entry=CAPACITY );

// COPY CONSTRUCTOR

sequence(const sequence& entry) ;

// Library facilities used: cstdlib

// MODIFICATION MEMBER FUNCTIONS

void start( );

void advance( );

void insert(const value_type& entry);

void attach(const value_type& entry);

void remove_current( );

void resize(size_type );

void sequence::operator =(const sequence&);

// CONSTANT MEMBER FUNCTIONS

size_type size( ) const;

bool is_item( ) const;

value_type current( ) const;

//Destructor

~sequence() ;

private:

value_type *data;

size_type used;

size_type capacity;

size_type current_index;

};

}

#endif

FILES

sequence_test.cpp

// FILE: sequence_test.cpp // An interactive test program for the new sequence class #include // Provides toupper #include // Provides cout and cin #include // Provides EXIT_SUCCESS #include "sequence2.h" // With value_type defined as double using namespace std; using namespace CISP430_A2;

// PROTOTYPES for functions used by this test program: void print_menu( ); // Postcondition: A menu of choices for this program has been written to cout.

char get_user_command( ); // Postcondition: The user has been prompted to enter a one character command. // The next character has been read (skipping blanks and newline characters), // and this character has been returned.

void show_sequence(sequence display); // Postcondition: The items on display have been printed to cout (one per line).

double get_number( ); // Postcondition: The user has been prompted to enter a real number. The // number has been read, echoed to the screen, and returned by the function.

int main( ) { sequence test; // A sequence that well perform tests on char choice; // A command character entered by the user cout << "I have initialized an empty sequence of real numbers." << endl;

do { print_menu( ); choice = toupper(get_user_command( )); switch (choice) { case '!': test.start( ); break; case '+': test.advance( ); break; case '?': if (test.is_item( )) cout << "There is an item." << endl; else cout << "There is no current item." << endl; break; case 'C': if (test.is_item( )) cout << "Current item is: " << test.current( ) << endl; else cout << "There is no current item." << endl; break; case 'P': show_sequence(test); break; case 'S': cout << "Size is " << test.size( ) << '.' << endl; break; case 'I': test.insert(get_number( )); break; case 'A': test.attach(get_number( )); break; case 'R': test.remove_current( ); cout << "The current item has been removed." << endl; break; case 'Q': cout << "Ridicule is the best test of truth." << endl; break; default: cout << choice << " is invalid." << endl; } } while ((choice != 'Q'));

return EXIT_SUCCESS; }

void print_menu( ) // Library facilities used: iostream.h { cout << endl; // Print blank line before the menu cout << "The following choices are available: " << endl; cout << " ! Activate the start( ) function" << endl; cout << " + Activate the advance( ) function" << endl; cout << " ? Print the result from the is_item( ) function" << endl; cout << " C Print the result from the current( ) function" << endl; cout << " P Print a copy of the entire sequence" << endl; cout << " S Print the result from the size( ) function" << endl; cout << " I Insert a new number with the insert(...) function" << endl; cout << " A Attach a new number with the attach(...) function" << endl; cout << " R Activate the remove_current( ) function" << endl; cout << " Q Quit this test program" << endl; }

char get_user_command( ) // Library facilities used: iostream { char command;

cout << "Enter choice: "; cin >> command; // Input of characters skips blanks and newline character

return command; }

void show_sequence(sequence display) // Library facilities used: iostream { for (display.start( ); display.is_item( ); display.advance( )) cout << display.current( ) << endl; }

double get_number( ) // Library facilities used: iostream { double result; cout << "Please enter a real number for the sequence: "; cin >> result; cout << result << " has been read." << endl; return result; }

FILES

sequence_exam2.cpp

// FILE: sequence_exam2.cpp

// Non-interactive test program for the sequence class using a dynamic array,

// with improved test for heap leaks.

//

// DESCRIPTION:

// Each function of this program tests part of the sequence class, returning

// some number of points to indicate how much of the test was passed.

// A description and result of each test is printed to cout.

// Maximum number of points awarded by this program is determined by the

// constants POINTS[1], POINTS[2]...

#include // Provides cout.

#include // Provides memcpy.

#include // Provides size_t.

#include "sequence2.h" // Provides the Sequence class with double items.

using namespace std;

using namespace CISP430_A2;

// Descriptions and points for each of the tests:

const size_t MANY_TESTS = 7;

const int POINTS[MANY_TESTS+1] = {

200, // Total points for all tests.

30, // Test 1 points

30, // Test 2 points

30, // Test 3 points

20, // Test 4 points

30, // Test 5 points

30, // Test 6 points

30 // Test 7 points

};

const char DESCRIPTION[MANY_TESTS+1][256] = {

"tests for sequence class with a dynamic array",

"Testing insert, attach, and the constant member functions",

"Testing situations where the cursor goes off the sequence",

"Testing remove_current",

"Testing the resize member function",

"Testing the copy constructor",

"Testing the assignment operator",

"Testing insert/attach when current DEFAULT_CAPACITY exceeded"

};

// **************************************************************************

// bool test_basic(const sequence& test, size_t s, bool has_cursor)

// Postcondition: A return value of true indicates:

// a. test.size() is s, and

// b. test.is_item() is has_cursor.

// Otherwise the return value is false.

// In either case, a description of the test result is printed to cout.

// **************************************************************************

bool test_basic(const sequence& test, size_t s, bool has_cursor)

{

bool answer;

cout << "Testing that size() returns " << s << " ... ";

cout.flush( );

answer = (test.size( ) == s);

cout << (answer ? "Passed." : "Failed.") << endl;

if (answer)

{

cout << "Testing that is_item() returns ";

cout << (has_cursor ? "true" : "false") << " ... ";

cout.flush( );

answer = (test.is_item( ) == has_cursor);

cout << (answer ? "Passed." : "Failed.") << endl;

}

return answer;

}

// **************************************************************************

// bool test_items(sequence& test, size_t s, size_t i, double items[])

// The function determines if the test sequence has the correct items

// Precondition: The size of the items array is at least s.

// Postcondition: A return value of true indicates that test.current()

// is equal to items[i], and after test.advance() the result of

// test.current() is items[i+1], and so on through items[s-1].

// At this point, one more advance takes the cursor off the sequence.

// If any of this fails, the return value is false.

// NOTE: The test sequence has been changed by advancing its cursor.

// **************************************************************************

bool test_items(sequence& test, size_t s, size_t i, double items[])

{

bool answer = true;

cout << "The cursor should be at item [" << i << "]" << " of the sequence ";

cout << "(counting the first item as [0]). I will advance the cursor ";

cout << "to the end of the sequence, checking that each item is correct...";

cout.flush( );

while ((i < s) && test.is_item( ) && (test.current( ) == items[i]))

{

i++;

test.advance( );

}

if ((i != s) && !test.is_item( ))

{ // The test.is_item( ) function returns false too soon.

cout << " Cursor fell off the sequence too soon." << endl;

answer = false;

}

else if (i != s)

{ // The test.current( ) function returned a wrong value.

cout << " The item [" << i << "] should be " << items[i] << ", ";

cout << " but it was " << test.current( ) << " instead. ";

answer = false;

}

else if (test.is_item( ))

{ // The test.is_item( ) function returns true after moving off the sequence.

cout << " The cursor was moved off the sequence,";

cout << " but is_item still returns true." << endl;

answer = false;

}

cout << (answer ? "Passed." : "Failed.") << endl;

return answer;

}

// **************************************************************************

// bool correct(sequence& test, size_t s, size_t cursor_spot, double items[])

// This function determines if the sequence (test) is "correct" according to

// these requirements:

// a. it has exactly s items.

// b. the items (starting at the front) are equal to

// items[0] ... items[s-1]

// c. if cursor_spot < s, then test's cursor must be at

// the location given by cursor_spot.

// d. if cursor_spot >= s, then test must not have a cursor.

// NOTE: The function also moves the cursor off the sequence.

// **************************************************************************

bool correct(sequence& test, size_t size, size_t cursor_spot, double items[])

{

bool has_cursor = (cursor_spot < size);

// Check the sequence's size and whether it has a cursor.

if (!test_basic(test, size, has_cursor))

{

cout << "Basic test of size() or is_item() failed." << endl << endl;

return false;

}

// If there is a cursor, check the items from cursor to end of the sequence.

if (has_cursor && !test_items(test, size, cursor_spot, items))

{

cout << "Test of the sequence's items failed." << endl << endl;

return false;

}

// Restart the cursor at the front of the sequence and test items again.

cout << "I'll call start() and look at the items one more time..." << endl;

test.start( );

if (has_cursor && !test_items(test, size, 0, items))

{

cout << "Test of the sequence's items failed." << endl << endl;

return false;

}

// If the code reaches here, then all tests have been passed.

cout << "All tests passed for this sequence." << endl << endl;

return true;

}

// **************************************************************************

// int test1( )

// Performs some basic tests of insert, attach, and the constant member

// functions. Returns POINTS[1] if the tests are passed. Otherwise returns 0.

// **************************************************************************

int test1( )

{

sequence empty; // An empty sequence

sequence test; // A sequence to add items to

double items1[4] = { 5, 10, 20, 30 }; // These 4 items are put in a sequence

double items2[4] = { 10, 15, 20, 30 }; // These are put in another sequence

// Test that the empty sequence is really empty

cout << "Starting with an empty sequence." << endl;

if (!correct(empty, 0, 0, items1)) return 0;

// Test the attach function to add something to an empty sequence

cout << "I am now using attach to put 10 into an empty sequence." << endl;

test.attach(10);

if (!correct(test, 1, 0, items2)) return 0;

// Test the insert function to add something to an empty sequence

cout << "I am now using insert to put 10 into an empty sequence." << endl;

test = empty;

test.insert(10);

if (!correct(test, 1, 0, items2)) return 0;

// Test the insert function to add an item at the front of a sequence

cout << "I am now using attach to put 10,20,30 in an empty sequence. ";

cout << "Then I move the cursor to the start and insert 5." << endl;

test = empty;

test.attach(10);

test.attach(20);

test.attach(30);

test.start( );

test.insert(5);

if (!correct(test, 4, 0, items1)) return 0;

// Test the insert function to add an item in the middle of a sequence

cout << "I am now using attach to put 10,20,30 in an empty sequence. ";

cout << "Then I move the cursor to the start, advance once, ";

cout << "and insert 15." << endl;

test = empty;

test.attach(10);

test.attach(20);

test.attach(30);

test.start( );

test.advance( );

test.insert(15);

if (!correct(test, 4, 1, items2)) return 0;

// Test the attach function to add an item in the middle of a sequence

cout << "I am now using attach to put 10,20,30 in an empty sequence. ";

cout << "Then I move the cursor to the start and attach 15 ";

cout << "after the 10." << endl;

test = empty;

test.attach(10);

test.attach(20);

test.attach(30);

test.start( );

test.attach(15);

if (!correct(test, 4, 1, items2)) return 0;

// All tests have been passed

cout << "All tests of this first function have been passed." << endl;

return POINTS[1];

}

// **************************************************************************

// int test2( )

// Performs a test to ensure that the cursor can correctly be run off the end

// of the sequence. Also tests that attach/insert work correctly when there is

// no cursor. Returns POINTS[2] if the tests are passed. Otherwise returns 0.

// **************************************************************************

int test2( )

{

sequence test;

size_t i;

// Put three items in the sequence

cout << "Using attach to put 20 and 30 in the sequence, and then calling ";

cout << "advance, so that is_item should return false ... ";

cout.flush( );

test.attach(20);

test.attach(30);

test.advance( );

if (test.is_item( ))

{

cout << "failed." << endl;

return 0;

}

cout << "passed." << endl;

// Insert 10 at the front and run the cursor off the end again

cout << "Inserting 10, which should go at the sequence's front." << endl;

cout << "Then calling advance three times to run cursor off the sequence ...";

cout.flush( );

test.insert(10);

test.advance( ); // advance to the 20

test.advance( ); // advance to the 30

test.advance( ); // advance right off the sequence

if (test.is_item( ))

{

cout << " failed." << endl;

return false;

}

cout << " passed." << endl;

// Attach more items until the sequence becomes full.

// Note that the first attach should attach to the end of the sequence.

cout << "Calling attach to put the numbers 40, 50, 60 ...";

cout << test.CAPACITY*10 << " at the sequence's end." << endl;

for (i = 4; i <= test.CAPACITY; i++)

test.attach(i*10);

// Test that the sequence is correctly filled.

cout << "Now I will test that the sequence has 10, 20, 30, ...";

cout << test.CAPACITY*10 << "." << endl;

test.start( );

for (i = 1; i <= test.CAPACITY; i++)

{

if ((!test.is_item( )) || test.current( ) != i*10)

{

cout << " Test failed to find " << i*10 << endl;

return 0;

}

test.advance( );

}

if (test.is_item( ))

{

cout << " There are too many items on the sequence." << endl;

return false;

}

// All tests passed

cout << "All tests of this second function have been passed." << endl;

return POINTS[2];

}

// **************************************************************************

// int test3( )

// Performs basic tests for the remove_current function.

// Returns POINTS[3] if the tests are passed. Returns POINTS[3] / 4 if almost

// all the tests are passed. Otherwise returns 0.

// **************************************************************************

int test3( )

{

// In the next declarations, I am declaring a sequence called test.

// Both before and after the sequence, I declare a small array of characters,

// and I put the character 'x' into each spot of these arrays.

// Later, if I notice that one of the x's has been changed, or if

// I notice an 'x' inside of the sequence, then the most

// likely reason was that one of the sequence's member functions accessed

// the sequence's array outside of its legal indexes.

char prefix[4] = {'x', 'x', 'x', 'x'};

sequence test;

char suffix[4] = {'x', 'x', 'x', 'x'};

// Within this function, I create several different sequences using the

// items in these arrays:

double items1[1] = { 30 };

double items2[2] = { 10, 30 };

double items3[3] = { 10, 20, 30 };

size_t i; // for-loop control variable

char *char_ptr; // Variable to loop at each character in a sequence's memory

// Build a sequence with three items 10, 20, 30, and remove the middle,

// and last and then first.

cout << "Using attach to build a sequence with 10,30." << endl;

test.attach(10);

test.attach(30);

cout << "Insert a 20 before the 30, so entire sequence is 10,20,30." << endl;

test.insert(20);

if (!correct(test, 3, 1, items3)) return 0;

cout << "Remove the 20, so entire sequence is now 10,30." << endl;

test.start( );

test.advance( );

test.remove_current( );

if (!correct(test, 2, 1, items2)) return 0;

cout << "Remove the 30, so entire sequence is now just 10 with no cursor.";

cout << endl;

test.start( );

test.advance( );

test.remove_current( );

if (!correct(test, 1, 1, items2)) return 0;

cout << "Set the cursor to the start and remove the 10." << endl;

test.start( );

test.remove_current( );

if (!correct(test, 0, 0, items2)) return 0;

// Build a sequence with three items 10, 20, 30, and remove the middle,

// and then first and then last.

cout << "Using attach to build another sequence with 10,30." << endl;

test.attach(10);

test.attach(30);

cout << "Insert a 20 before the 30, so entire sequence is 10,20,30." << endl;

test.insert(20);

if (!correct(test, 3, 1, items3)) return 0;

cout << "Remove the 20, so entire sequence is now 10,30." << endl;

test.start( );

test.advance( );

test.remove_current( );

if (!correct(test, 2, 1, items2)) return 0;

cout << "Set the cursor to the start and remove the 10," << endl;

cout << "so the sequence should now contain just 30." << endl;

test.start( );

test.remove_current( );

if (!correct(test, 1, 0, items1)) return 0;

cout << "Remove the 30 from the sequence, resulting in an empty sequence." << endl;

test.start( );

test.remove_current( );

if (!correct(test, 0, 0, items1)) return 0;

// Build a sequence with three items 10, 20, 30, and remove the first.

cout << "Build a new sequence by inserting 30, 10, 20 (so the sequence ";

cout << "is 20, then 10, then 30). Then remove the 20." << endl;

test.insert(30);

test.insert(10);

test.insert(20);

test.remove_current( );

if (!correct(test, 2, 0, items2)) return 0;

test.start( );

test.remove_current( );

test.remove_current( );

// Just for fun, fill up the sequence, and empty it!

cout << "Just for fun, I'll empty the sequence then fill it up, then ";

cout << "empty it again. During this process, I'll try to determine ";

cout << "whether any of the sequence's member functions access the ";

cout << "array outside of its legal indexes." << endl;

for (i = 0; i < test.CAPACITY; i++)

test.insert(0);

for (i = 0; i < test.CAPACITY; i++)

test.remove_current( );

// Make sure that the character 'x' didn't somehow get into the sequence,

// as that would indicate that the sequence member functions are

// copying data from before or after the sequence into the sequence.

char_ptr = (char *) &test;

for (i = 0; i < sizeof(sequence); i++)

if (char_ptr[i] == 'x')

{

cout << "Illegal array access detected." << endl;

return POINTS[3] / 4;

}

// Make sure that the prefix and suffix arrays still have four

// x's each. Otherwise one of the sequence operations wrote outside of

// the legal boundaries of its array.

for (i = 0; i < 4; i++)

if ((suffix[i] != 'x') || (prefix[i] != 'x'))

{

cout << "Illegal array access detected." << endl;

return POINTS[3] / 4;

}

// All tests passed

cout << "All tests of this third function have been passed." << endl;

return POINTS[3];

}

// **************************************************************************

// int test4( )

// Performs some tests of resize.

// Returns POINTS[4] if the tests are passed. Otherwise returns 0.

// **************************************************************************

int test4( )

{

sequence test;

size_t i;

char bytes[sizeof(sequence)];

char newbytes[sizeof(sequence)];

size_t mismatches;

cout << "I will now resize a sequence to a larger capacity, and then ";

cout << "attach that many items. The sequence should NOT need to ";

cout << "resize itself under this situation." << endl;

test.resize(2*test.CAPACITY);

test.attach(0);

memcpy(bytes, (char *) &test, sizeof(sequence));

// At this point, I should be able to insert 2*DEFAULT_CAPACITY-1

// more items without calling resize again. Therefore, at most 1 byte

// of the object will change (the least significant byte of used).

for (i = 1; i < 2*test.CAPACITY; i++)

test.attach(i);

test.start( );

memcpy(newbytes, (char *) &test, sizeof(sequence));

for (i = 0; i < 2*test.CAPACITY; i++)

{

if (test.current( ) != i)

{

cout << " sequence does not contain correct items." << endl;

return 0;

}

test.advance( );

}

test.start( );

mismatches = 0;

for (i = 0; i < sizeof(sequence); i++)

if (bytes[i] != newbytes[i])

mismatches++;

if (mismatches > 1)

{

cout << " sequence was resized when it should not be." << endl;

return 0;

}

else

cout << " Test passed." << endl;

cout << "Now I will call resize(1) for the sequence, but the actual ";

cout << "sequence should not change because the sequence already has ";

cout << test.CAPACITY*2 << " items." << endl;

memcpy(bytes, (char *) &test, sizeof(sequence));

test.resize(1);

mismatches = 0;

for (i = 0; i < sizeof(sequence); i++)

if (bytes[i] != newbytes[i])

mismatches++;

if (mismatches > 0)

{

cout << " sequence was resized when it should not be." << endl;

return 0;

}

else

cout << " Test passed." << endl;

// All tests passed

cout << "All tests of this fourth function have been passed." << endl;

return POINTS[4];

}

// **************************************************************************

// int test5( )

// Performs some tests of the copy constructor.

// Returns POINTS[5] if the tests are passed. Otherwise returns 0.

// **************************************************************************

int test5( )

{

sequence original; // A sequence that we'll copy.

double items[2*original.CAPACITY];

size_t i;

// Set up the items array to conatin 1...2*DEFAULT_CAPACITY.

for (i = 1; i <= 2*original.CAPACITY; i++)

items[i-1] = i;

// Test copying of an empty sequence. After the copying, we change the original.

cout << "Copy constructor test: for an empty sequence." << endl;

sequence copy1(original);

original.attach(1); // Changes the original sequence, but not the copy.

if (!correct(copy1, 0, 0, items)) return 0;

// Test copying of a sequence with current item at the tail.

cout << "Copy constructor test: for a sequence with cursor at tail." << endl;

for (i=2; i <= 2*original.CAPACITY; i++)

original.attach(i);

sequence copy2(original);

original.start( );

original.advance( );

original.remove_current( ); // Removes 2 from the original, but not the copy.

if (!correct

(copy2, 2*original.CAPACITY, 2*original.CAPACITY-1, items)

)

return 0;

// Test copying of a sequence with cursor near the middle.

cout << "Copy constructor test: for a sequence with cursor near middle." << endl;

original.insert(2);

for (i = 1; i < original.CAPACITY; i++)

original.advance( );

// Cursor is now at location [DEFAULT_CAPACITY] (counting [0] as the first spot).

sequence copy3(original);

original.start( );

original.advance( );

original.remove_current( ); // Removes 2 from the original, but not the copy.

if (!correct

(copy3, 2*original.CAPACITY, original.CAPACITY, items)

)

return 0;

// Test copying of a sequence with cursor at the front.

cout << "Copy constructor test: for a sequence with cursor near middle." << endl;

original.insert(2);

original.start( );

// Cursor is now at the front.

sequence copy4(original);

original.start( );

original.advance( );

original.remove_current( ); // Removes 2 from the original, but not the copy.

if (!correct

(copy4, 2*original.CAPACITY, 0, items)

)

return 0;

// Test copying of a sequence with no current item.

cout << "Copy constructor test: for a sequence with no current item." << endl;

original.insert(2);

while (original.is_item( ))

original.advance( );

// There is now no current item.

sequence copy5(original);

original.start( );

original.advance( );

original.remove_current( ); // Removes 2 from the original, but not the copy.

if (!correct

(copy5, 2*original.CAPACITY, 2*original.CAPACITY, items)

)

return 0;

// All tests passed

cout << "All tests of this fifth function have been passed." << endl;

return POINTS[5];

}

// **************************************************************************

// int test6( )

// Performs some tests of the assignment operator.

// Returns POINTS[6] if the tests are passed. Otherwise returns 0.

// **************************************************************************

int test6( )

{

sequence original; // A sequence that we'll copy.

double items[2*original.CAPACITY];

size_t i;

// Set up the items array to conatin 1...2*DEFAULT_CAPACITY.

for (i = 1; i <= 2*original.CAPACITY; i++)

items[i-1] = i;

// Test copying of an empty sequence. After the copying, we change the original.

cout << "Assignment operator test: for an empty sequence." << endl;

sequence copy1;

copy1 = original;

original.attach(1); // Changes the original sequence, but not the copy.

if (!correct(copy1, 0, 0, items)) return 0;

// Test copying of a sequence with current item at the tail.

cout << "Assignment operator test: for a sequence with cursor at tail." << endl;

for (i=2; i <= 2*original.CAPACITY; i++)

original.attach(i);

sequence copy2;

copy2 = original;

original.start( );

original.advance( );

original.remove_current( ); // Removes 2 from the original, but not the copy.

if (!correct

(copy2, 2*original.CAPACITY, 2*original.CAPACITY-1, items)

)

return 0;

// Test copying of a sequence with cursor near the middle.

cout << "Assignment operator test: for a sequence with cursor near middle." << endl;

original.insert(2);

for (i = 1; i < original.CAPACITY; i++)

original.advance( );

// Cursor is now at location [DEFAULT_CAPACITY] (counting [0] as the first spot).

sequence copy3;

copy3 = original;

original.start( );

original.advance( );

original.remove_current( ); // Removes 2 from the original, but not the copy.

if (!correct

(copy3, 2*original.CAPACITY, original.CAPACITY, items)

)

return 0;

// Test copying of a sequence with cursor at the front.

cout << "Assignment operator test: for a sequence with cursor near middle." << endl;

original.insert(2);

original.start( );

// Cursor is now at the front.

sequence copy4;

copy4 = original;

original.start( );

original.advance( );

original.remove_current( ); // Removes 2 from the original, but not the copy.

if (!correct

(copy4, 2*original.CAPACITY, 0, items)

)

return 0;

// Test copying of a sequence with no current item.

cout << "Assignment operator test: for a sequence with no current item." << endl;

original.insert(2);

while (original.is_item( ))

original.advance( );

// There is now no current item.

sequence copy5;

copy5 = original;

original.start( );

original.advance( );

original.remove_current( ); // Removes 2 from the original, but not the copy.

if (!correct

(copy5, 2*original.CAPACITY, 2*original.CAPACITY, items)

)

return 0;

cout << "Checking correctness of a self-assignment x = x;" << endl;

original.insert(2);

original = original;

if (!correct

(original, 2*original.CAPACITY, 1, items)

)

return 0;

// All tests passed

cout << "All tests of this sixth function have been passed." << endl;

return POINTS[6];

}

// **************************************************************************

// int test7( )

// Performs some basic tests of insert and attach for the case where the

// current capacity has been reached.

// Returns POINTS[7] if the tests are passed. Otherwise returns 0.

// **************************************************************************

int test7( )

{

sequence testa, testi;

double items[2*testa.CAPACITY];

size_t i;

// Set up the items array to conatin 1...2*DEFAULT_CAPACITY.

for (i = 1; i <= 2*testa.CAPACITY; i++)

items[i-1] = i;

cout << "Testing to see that attach works correctly when the ";

cout << "current capacity is exceeded." << endl;

for (i = 1; i <= 2*testa.CAPACITY; i++)

testa.attach(i);

if (!correct

(testa, 2*testa.CAPACITY, 2*testa.CAPACITY-1, items)

)

return 0;

cout << "Testing to see that insert works correctly when the ";

cout << "current capacity is exceeded." << endl;

for (i = 2*testi.CAPACITY; i >= 1; i--)

testi.insert(i);

if (!correct

(testi, 2*testi.CAPACITY, 0, items)

)

return 0;

// All tests passed

cout << "All tests of this seventh function have been passed." << endl;

return POINTS[7];

}

int run_a_test(int number, const char message[], int test_function( ), int max)

{

int result;

cout << endl << "START OF TEST " << number << ":" << endl;

cout << message << " (" << max << " points)." << endl;

result = test_function( );

if (result > 0)

{

cout << "Test " << number << " got " << result << " points";

cout << " out of a possible " << max << "." << endl;

}

else

cout << "Test " << number << " failed." << endl;

cout << "END OF TEST " << number << "." << endl << endl;

return result;

}

// **************************************************************************

// int main( )

// The main program calls all tests and prints the sum of all points

// earned from the tests.

// **************************************************************************

int main( )

{

int sum = 0;

cout << "Running " << DESCRIPTION[0] << endl;

sum += run_a_test(1, DESCRIPTION[1], test1, POINTS[1]);

sum += run_a_test(2, DESCRIPTION[2], test2, POINTS[2]);

sum += run_a_test(3, DESCRIPTION[3], test3, POINTS[3]);

sum += run_a_test(4, DESCRIPTION[4], test4, POINTS[4]);

sum += run_a_test(5, DESCRIPTION[5], test5, POINTS[5]);

sum += run_a_test(6, DESCRIPTION[6], test6, POINTS[6]);

sum += run_a_test(7, DESCRIPTION[7], test7, POINTS[7]);

cout << "If you submit this sequence now, you will have ";

cout << sum << " points out of the " << POINTS[0];

cout << " points from this test program. ";

system("PAUSE");

return EXIT_SUCCESS;

}