error C2679: binary '<<' : no operator found which takes a right-hand operand of type 'std::string' (or there is no acceptable conversion)

问题

Here's my code, how do I fix this error?

#include "stdafx.h"
#include <iostream>

using namespace std;

int main()
{
    string title = "THE WORLD OF PIRATES";
    cout << title << endl;
    cout << " Welcome to the world of pirates";

    cin.get();

    return 0;
}

The error is

binary '<<' : no operator found which takes a right-hand operand of type 'std::string' (or there is no acceptable conversion)

回答1:

You forgot to #include <string>

using std::string without including it's header works on some compilers that indirectly import parts of <string> into their <iostream> or other headers but that's not standard and shouldn't be relied upon. Also they often break when you try to output a string since they only included a part of the implementation and are missing the part that implements the operator<<.

来源：https://stackoverflow.com/questions/22724064/error-c2679-binary-no-operator-found-which-takes-a-right-hand-operand-of