6.42

#include<iostream>#include<string>#include<vector>using namespace std;string make_plural(size_t ctr, const string &word, const string &ending = "s"){return (ctr > 1) ? word + ending : word;}int main(){cout << make_plural(1, "success", "es") << " " << make_plural(1, "failure") << endl;cout << make_plural(2, "success", "es") << " " << make_plural(2, "failure") << endl;return 0;}