c++ - 为什么我不能找到一个字符串？

Question

为什么我不能像这样cout string:

string text ;
text = WordList[i].substr(0,20) ;
cout << "String is  : " << text << endl ;

当我这样做时，我收到以下错误:

Error 2 error C2679: binary '<<' : no operator found which takes a right-hand operand of type 'std::string' (or there is no acceptable conversion) c:\users\mollasadra\documents\visual studio 2008\projects\barnamec\barnamec\barnamec.cpp 67 barnamec**

令人惊讶的是，即使这样也不起作用:

string text ;
text = "hello"  ;
cout << "String is  : " << text << endl ;

Answer 1

你需要包含

#include <string>
#include <iostream>