Question

How to replace the last occurrence of a character in a string with C++

Answer 1

#include <iostream>
#include <string>

std::string ReplaceTheLastOccurrenceOfACharacterInAString(std::string str, const char charToReplace, const char replacementChar) {
    size_t pos = str.rfind(charToReplace);

    if (pos != std::string::npos) {
        str[pos] = replacementChar;
    }
    
    return str;
}
 
int main()
{
    std::string str = "c++ c python c++ java c++ php";
    char charToReplace = 'c';
    char replacementChar = 'W';

    str = ReplaceTheLastOccurrenceOfACharacterInAString(str, charToReplace, replacementChar);
 
    std::cout << str; 
}



/*
run:

c++ c python c++ java W++ php

*/

 

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