C++ Library Assignments

Write a C++ program that duplicates the functionality that strlen, strcmp and strcpy perform. The catch is not to use these builtin functions but to walk through the arrays character by character.

Strlen = calculates the length of a given string

Strcmp = compares two strings and will print out true if they are equal. For this you will use the equality “==” logical operator.

Strcpy = copies one string into a new string. For this you will need two arrays of the same size.

You will need to write three loops to solve this problem. The input could either be input from the keyboard or hard-coded into your program. By hard-coded I mean declared in main. For example

strlen

void main()

{

            myString = “abcde”;

            //figure out the length of the string in a loop

}

Extra Credit

Break your code into three separate functions that are called from main().

Call the functions stringLength(), stringCompare() and stringCopy()

• Create a function called stringLength() that takes an array as an input argument and returns an integer representing the length of the string.
• Create a function called stringCompare() that takes in two arrays as input arguments and returns a Boolean representing true if the arrays are equal and false if they are not
• Create function Prototypes
• Create a function called stringCopy() that takes in one array and returns an array with the same value
• Try to break your functions by testing with all kind of test cases