How can I append data to a std::string in hex format?

Question

I have an existing std::string and an int. I\'d like to concatenate the ASCII (string literal) hexadecimal representation of the integer to the

Answer 1

Use a stringstream. You can use it as any other output stream, so you can equally insert std::hex into it. Then extract it's stringstream::str() function.

std::stringstream ss;
ss << "your id is " << std::hex << 0x0daffa0;
const std::string s = ss.str();