Problem: Implement an interface that manipulates a list of strings. You will be provided with the following files on the Tracs:

StringList.h containing a class declaration, set up for a linked list representation.

Driver.cpp containing a main function you can use to test your implementation.

You will be responsible for providing the StringList.cpp file, including the implementation of the StringList member functions (described below):

StringList and ~StringList: creates an empty list, and deallocates all the nodes in the list, respectively.

count: returns the total number of strings (nodes) in the list. Any duplicate strings should be counted.

add(string) Adds a new node containing the string to either the beginning OR the end of the list (your choice, pick one, use the same one every time).

remove(string) removes a node containing the given string from the linked list. Returns true if successful, otherwise false (if the string was not in the list).

display(): displays the strings in the list to the screen, one string per line.

minimum(): returns the string that would come first in alphabetical (ascii) ordering. Does not change the list!

sort(): Here is the algorithm you must use for implementing the sort function:

1. Define a StringNode * to be the head of a new list (make it the empty list). This should be a local variable (not a class member).

2. Repeat until the original list is empty: a. Find the minimum string in the original list and remove that node from the original list. Call functions you have already defined to do this.

b. Insert this node into the proper position in the new list (at the end).

3. make the old head pointer (now empty) point to the new list!

Input/Output:

Use the provided Driver.cpp file to test your code. I recommend trying to implement one or two functions at a time, and testing them, rather than implementing all the functions and then trying to debug them all at once.

NOTES:

This program must be done in a Linux or Unix environment, using a command line

compiler like g++. Do not use codeblocks, eclipse, or Xcode to compile.

Put your code in a file named StringList.cpp.

Your StringList.cpp file must compile with the (unchanged) provided files, otherwise you may receive a score of 0.

You may re-use code from the NumberList class (source: book/slides/website). Logistics:

For this assignment you need to submit only the StringList.cpp file. You do not need a zip file, you do not need a makefile, you do not need to provide your driver.

There are two steps to the turn-in process:

Submit an electronic copy using the Assignments tool on the TRACS website for this class.

Submit a printout of the source file at the beginning of class, the next class day after the assignment is due. Please print your name on top of the front page, and staple if there is more than one page.

Note: Each member of a group must submit their own electronic copy and their own printout!! Make sure your name is written or circled on your printout.

See the assignment turn-in policy on the syllabus posted on Tracs for more details.

Here are the given files:

// File Name: ListDriver.cpp // // // A demo driver for StringList. // #include #include using namespace std; #include "StringList.h" int main() { //testing StringList StringList slist; string movie1 = "Star Wars"; string movie2 = "Fargo"; string movie3 = "Back to the Future"; string movie4 = "Titanic"; // Testing add/display/count cout << "Testing add/display/count: " << endl; cout << "count is: " << slist.count() << endl; slist.add(movie1); slist.display(); cout << "count is: " << slist.count() << endl; // slist.add(movie2); // slist.display(); // cout << "count is: " << slist.count() << endl; // // slist.add(movie3); // slist.add(movie4); // slist.display(); // cout << "count is: " << slist.count() << endl; // // // Testing remove // cout << endl; // cout << "Testing remove: " << endl; // bool delResult; // delResult = slist.remove(movie4); // cout << "remove result movie4 = " << boolalpha << delResult << endl; // // delResult = slist.remove(movie3); // cout << "remove result movie3 = " << boolalpha << delResult << endl; // // delResult = slist.remove("Not There"); // cout << "remove result Not There = " << boolalpha << delResult << endl; // // cout << "display after remove: " << endl; // slist.display(); // cout << "count is: " << slist.count() << endl; // // // Testing minimum // cout << endl; // cout << "Testing minimum: " << endl; // // cout << "Test minimum 1: " << endl; // slist.display(); // cout << "minimum: " << boolalpha << slist.minimum() << endl; // // cout << "Test minimum 2: " << endl; // slist.add(movie4); // slist.display(); // cout << "minimum: " << boolalpha << slist.minimum() << endl; // // cout << "Test minimum 3: " << endl; // slist.add(movie3); // slist.display(); // cout << "minimum: " << boolalpha << slist.minimum() << endl; // // //Testing sort and display // cout << endl; // cout << "Testing sort/display: " << endl; // slist.sort(); // slist.display(); // // // cout << endl; // cout << "Testing sort/display after add: " << endl; // slist.add("Jurassic Park"); // slist.display(); // cout << "now sorted: " << endl; // slist.sort(); // slist.display(); }

// File Name: StringList.h // // // Represents a list of strings. // Supports adding and removing strings, displaying and sorting strings, // finding the minimum and count of the number of strings in the list. #include  using namespace std; class StringList { private: struct StringNode // the Nodes of the linked list { string data; // data is a string StringNode *next; // points to next node in list }; StringNode *head; // the head pointer public: StringList(); ~StringList(); int count(); void add(string); bool remove(string); void display(); string minimum(); void sort(); };