Problem 3 Deliverables: problem3functions.h and problem3functions.cc Functions

Test all of your code on a Linux lab computer. All source files submitted must compile and run on a Linux lab computer of the instructors choice. Submissions that do not compile on the Linux workstation will receive no compilation or execution/correctness points. 

You should submit only the following individual files to the assignment: problem3functions.h, problem3functions.cc 

Write a function named NumDigits that takes an integer parameter and returns the number of digits in the integer.

 Example calls: NumDigits(1078) should return 4 NumDigits(-10) should return 2 

Write a function named FindAndReplace that replaces digits within an integer variable.

 The function will take an integer variable to search, a positive integer to find, and a positive integer to replace as arguments. The function should find all occurrences of the find integer within the integer variable and replace them with replace integer, moving from right to left. 

 Preconditions: the second and third arguments should be positive integers, and the second argument should contain at least as many digits as the third argument. If the preconditions are not met, the function should return false and leave the first argument unchanged. 

 Example calls: example 1: 

x = 12325;

 FindAndReplace(x, 2, 7); - the function should return true, and after the function call x should hold 17375 

 example 2: x = 11811; 

 FindAndReplace(x, 11, 6); - the function should return true, and after the function call x should hold 6806 

example 3: x = 118111; 

 FindAndReplace(x, 11, 23); - the function should return true, and after the function call x should hold 238123 

 example 4: x = 10345; 

 FindAndReplace(x, 3, 10); - the function should return false because the second argument has fewer digits (1) than 

 the third argument (2), and after the function call x should hold 10345 

 example 5: x = 18; 

 FindAndReplace(x, -1, 1); - the function should return false because the second argument is negative, and after the 

 function call x should hold 18 

Both function prototypes should be included in problem3.h

Both functions should be implemented in problem3.cc Initial Testing:

 A makefile and some minimal unit tests have been included in problem3tests.zip. You are encouraged to create more rigorous tests. To run the test provided, create a directory containing only your problem3functions.h file, your problem3functions.cc file, and the files extracted from the attached problem3tests.zip. Then type 

 make testNumDigits make testFindAndReplace 

Points: style: 1 point clean compilation: 1 point NumDigits passes instructors unit tests: 1 point FindAndReplace passes instructors unit tests: 2 points

makefile

# makefile for problem 3

#

# $@ target

# $< first prerequisite

# $^ all prerequisites

flags = -std=c++17 -Wall -I .

problem3functions.o : problem3functions.cc problem3functions.h

g++ $(flags) -c $<

testNumDigits : testNumDigits.cc problem3functions.o

g++ $(flags) $^ -o $@

./$@

testFindAndReplace : testFindAndReplace.cc problem3functions.o

g++ $(flags) $^ -o $@

./$@

clean :

rm problem3functions.o testNumDigits testFindAndReplace

testFindAndReplace.cc

#include

using std::cout;

using std::endl;

using std::cin;

#include"problem3functions.h"

int main() {

int x = 1231231;

FindAndReplace(x, 3, 7);

if ( x == 1271271 )

cout << "Passed first one digit replacement test" << endl;

else

cout << "Failed first one digit replacement test" << endl;

x = 1231231;

FindAndReplace(x, 1, 0);

if ( x == 230230 )

cout << "Passed second one digit replacement test" << endl;

else

cout << "Failed second one digit replacement test" << endl;

x = 1231231;

FindAndReplace(x, 1, 0);

if ( x == 230230 )

cout << "Passed second one digit replacement test" << endl;

else

cout << "Failed second one digit replacement test" << endl;

x = -1785;

FindAndReplace(x, 78, 96);

if ( x == -1965 )

cout << "Passed third two digit replacement test" << endl;

else

cout << "Failed third two digit replacement test" << endl;

x = 11121111;

FindAndReplace(x, 11, 3);

if ( x == 10320303 )

cout << "Passed second two digit replacement test" << endl;

else

cout << "Failed second two digit replacement test" << endl;

x = -401401;

FindAndReplace(x, 41, 7);

if ( x == -401401 )

cout << "Passed third two digit replacement test" << endl;

else

cout << "Failed third two digit replacement test" << endl;

return 0;

}

testNumDigits.cc

#include

using std::cout;

using std::endl;

using std::cin;

#include"problem3functions.h"

int main() {

if ( NumDigits(1200) == 4 )

cout << "Passed NumDigits(1200) test" << endl;

else

cout << "Failed NumDigits(1200) test" << endl;

if ( NumDigits(-31) == 2 )

cout << "Passed NumDigits(-3) test" << endl;

else

cout << "Failed NumDigits(-3) test" << endl;

if ( NumDigits(0) == 1 )

cout << "Passed NumDigits(0) test" << endl;

else

cout << "Failed NumDigits(0) test" << endl;

return 0;

}