Question

How to remove specific characters from a string in C++

Answer 1

#include <iostream>
#include <algorithm>
#include <string>

int main() {
    std::string phone = "(555) 555-5555";
    char charsToRemove[] = "()-";
    int length = sizeof(charsToRemove)/sizeof(char);
    
    for (int i = 0; i < length; i++) {
        phone.erase(std::remove(phone.begin(), phone.end(), charsToRemove[i]), phone.end());
    }

    std::cout << phone << std::endl;
}

 
 
/*
run:
   
555 5555555
   
*/

 

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Answer 2

#include <iostream>
#include <algorithm>
#include <string>

std::string remove_specific_characters_from_string(std::string &str, char charsToRemove[], int length) {
    for (int i = 0; i < length; i++) {
        str.erase(std::remove(str.begin(), str.end(), charsToRemove[i]), str.end());
    } 
    
    return str;
}
 
int main() {
    std::string phone = "(555) 555-5555";
    char charsToRemove[] = "()-";
    int length = sizeof(charsToRemove)/sizeof(char);
    
    remove_specific_characters_from_string(phone, charsToRemove, length);
 
    std::cout << phone << std::endl;
}
 
  
  
/*
run:
    
555 5555555
    
*/

 

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