Mgiyuk

How to concatenate a std::string and an int? 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" ? "John21" Let me add to this: I tried 'str = "hi"; str += 5; cout << str;' and saw no effect. Turns out this calls operator+=(char) and adds a non-printable character. – daveagp Oct 25 '14 at 20:00 29 Answers 29 In alphabetical order: std::string name = "John"; int age = 21; std::string result; // 1. with Boost result = name + boost::lexical_cast<std::string>(age); // 2. with C++11 result = name + std::to_string(age); // 3. with F...