How to replace all occurrences of a character in string?

Question

What is the effective way to replace all occurrences of a character with another character in std::string?

Answer 1

std::string doesn't contain such function but you could use stand-alone replace function from algorithm header.

std::string s = SOME_STR;
std::replace( s.begin(), s.end(), 'x', 'y'); // replace all 'x' to 'y'

Answer 2

As Kirill suggested, either use the replace method or iterate along the string replacing each char independently.

Alternatively you can use the find method or find_first_of depending on what you need to do. None of these solutions will do the job in one go, but with a few extra lines of code you ought to make them work for you. :-)

Answer 3

A simple find and replace for a single character would go something like:

s.replace(s.find("x"), 1, "y")

To do this for the whole string, the easy thing to do would be to loop until your s.find starts returning npos. I suppose you could also catch range_error to exit the loop, but that's kinda ugly.