Question

Is there a quick, easy way of getting sprintf-like formatting when constructing a std::string? Something like…

std::string foo("A number (%d) and a character (%c).\n", 18, 'a');

Answer 1

Not built into the string’s constructor, but you might want to check out boost format. Its a more typesafe sprintf style string formatting. With it you can at least do this:

std::string foo = 
    boost::str(boost::format("A number (%d) and a character (%c)\n") % 18 % 'a');