string modification

[drk97]

hi everyone! i have to write a function to modify the input string by substituting each alphabetical character. for example, 'Programming' to
'Rtqitcookpi' (mod_int = 2). Thanks.

[Duthomhas]

I was at first confused by your using 'mod' -- which is a mathematical term for modulus (or, here, remainder).

The strictly technical way of expressing it is:

For each character value x in your string S:
    x = x + 1

Hopefully, expressing it this way helps. Start by making a function that takes a string:

void encode( char* s )  // void encode( string& s )
{
   ... // does something here to s
}

Inside the function, loop through each character in the string and modify it.

Then you can use your function easily enough:

int main()
{
  char str[] = "Programming";  // string str = "Programming";
  encode( str );
  cout << str << endl;
}

If your assignment is to use the std::string type, just change things as the comments indicate.

Hope this helps.