How to Replace All Occurrences of a Character in a C String?

Replacing All Occurrences of a Character in a String

In C , the std::string class does not provide a dedicated method for replacing characters in a string. However, you can utilize the std::replace function from the header, which operates on iterators, to effectively accomplish this task.

Consider the following code snippet:

#include <algorithm>
#include <string>

void replace_character(std::string& str, char old, char new) {
  std::replace(str.begin(), str.end(), old, new);
}

The replace_character function takes a reference to a string, the character to be replaced (old), and the replacement character (new). It uses the std::replace function to modify all occurrences of old with new within the string.

For example:

std::string str = "Hello, world!";
replace_character(str, 'l', 'x');

// Output: "Hexxo, worxd!"

This code snippet replaces all occurrences of the character 'l' with 'x' in the string str. Note that the original string is modified in-place.

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