#include <iostream>
#include <string>

using namespace std;



void fonction(string &content) {
   cout << content << endl;
}

void fonction(string &content, string s) {
   content = s;
   cout << content << endl;
}

int main(int argc, char *argv[])
{

   string content = "pouet";

   fonction(content);
   fonction(content, "truc");

}