Write a C++ function called ay that makes a copy of a C-string and also adds the two characters "ay" to the end of it. Here is what it should do: Dynamically allocate memory (using new) for a new...

 Write a
C++ function
called ay that makes a copy of a C-string and also adds the two characters "ay" to the end of it.  Here is what it should do:

• Dynamically allocate memory (using new) for a new C-string large enough to hold the result C-string.  It should be the minimum size necessary to store the result C-string.  Don't forget room for a null character!


• Put the result C-string into the newly allocated memory.  It must be a valid, NULL-terminated C-string.


• Return a pointer to the result string.

The function can assume that parameter
str
points to a valid, NULL-terminated C-string.  You can use cstring utility functions like strcpy(), strlen(), etc. if you like, but you are not required to.  You do not need to demonstrate calling this function.

Example: ay("Giants")should return a pointer to a newly-allocated, null-terminated C-string: "Giantsay"

Your function must have the following signature:

char* ay(char *str)