Question

How to concatenate (repeat) a string N times in C++

Answer 1

#include <iostream>

void repeatNtimes(std::string &s, int n) {
   std::string tmp = s;
   for (int i = 1; i < n; i++)
      s += tmp; 
}

int main() {
   std::string s = "c++";
   
   int n = 4;
   
   repeatNtimes(s, n);
   
   std::cout << s;
   
   return 0;
}



/*
run:

c++c++c++c++

*/

 

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Answer 2

#include <iostream>
  
std::string repeatNtimes(std::string s, int n) {
    std::string tmp = s;
    for (int i = 1; i < n; i++)
        s += tmp; 
    return s;
}
  
int main() {
    std::string s = "c++";
     
    int n = 4;
     
    s = repeatNtimes(s, n);
     
    std::cout << s;
     
    return 0;
}
  
  
  
/*
run:
  
c++c++c++c++
  
*/

 

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Answer 3

#include <iostream>
  
std::string repeatNtimes(std::string s, int n) {
    std::string tmp = s;
    for (int i = 1; i < n; i++)
        s += tmp; 
    return s;
}
  
int main() {
    std::string s = "c++";
     
    int n = 4;
     
    s = repeatNtimes(repeatNtimes(s, n), n);
     
    std::cout << s;
     
    return 0;
}
  
  
  
/*
run:
  
c++c++c++c++c++c++c++c++c++c++c++c++c++c++c++c++
  
*/

 

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