ADTs, Data Structures, and Problem Solving with C++ 2nd Edition by Larry Nyhoff

تمرين 5

The following exercises ask you to write functions to do various kinds of string processing. To test these functions you should write driver programs as instructed in Programming Problems 13-23 at the end of this chapter.
Write a function replace_all (), such that a call
? newString = replace_all( str , substring , newSubstring );
will return a copy of string str with each occurrence of substring replaced by newSubstring.