How to concatenate a std::string and an int?

Question

I thought this would be really simple but it's presenting some difficulties. If I have std::string name = "John"; int age = 21; How do I combine them to get a single string `"John21"`?

Answer 1

One way is to #include <stdio.h> and use sprintf

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using namespace std;

#include <stdio.h>

#include <string.h>

#include <iostream>

int main()

{

char str[5];

strcpy(str,"John");

int x=21;

char outbuff[255];

sprintf(outbuff,"%s%d",str,x);

cout << outbuff << endl;

}