Question

How to get the repeating characters of a string in C++

Answer 1

#include <iostream>
 
using namespace std;
 
string get_repeating_chars(string s) { 
    int len = s.length();
    string tmp;
     
    for (int i = 0; i < len; i++) { 
        for (int j = i + 1; j < len; j++) { 
            if (s[i] == s[j]) { 
                if (tmp.find(s[i]) == std::string::npos) {
                    tmp.append(1, s[i]);  
                    break; 
                }
            } 
        } 
    } 
    return tmp; 
} 
   
int main() {
    string s = "abcdeffghijgklmbbbbxzx"; 
     
    string tmp = get_repeating_chars(s); 
  
    cout << tmp;
}
 
 
 
/*
run:
 
bfgx
 
*/

 

70+ SQL courses for beginners and professionals