what does the - operator do with char *?

Question

I new to C. I am reading a find-replace algorithm for C and I am a bit confused what the - & + operators do in this code:

char *re         


        

Answer 1

p is just a pointer - an integer value.

The + and - operators work exactly as you'd expect - they increment or decrement the value of the pointer.

If you think of strings as a contiguous array of chars, you're just talking about a location within that string.