error C2679: binary '<<' : no operator found 解决办法

自己做了个小例子，编译未通过，代码如下：

#include <iostream>#include <stdlib.h>using namespace std;class Student{public:void setName(string _Name){m_strName = _Name;}string getName(){return m_strName;}void InitScore(){m_iscore = 0;}int getScore(){return m_iscore;}void Study(int _score){m_iscore += _score;}string m_strName;int m_iscore;};int main(void){Student m_std;m_std.InitScore();m_std.setName("zhangshan");m_std.Study(4);//语文cout << m_std.getName() << m_std.getScore() << endl;m_std.Study(6);cout << m_std.getName() << m_std.getScore() << endl;return 0;}

编译出错如下：

f:\study file\training\fengzhuang\fengzhuang1\fengzhuang.cpp(43) : error C2679: binary '<<' : no operator found which takes a right-hand operand of type 'std::string' (or there is no acceptable conversion)1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(653): could be 'std::basic_ostream<_Elem,_Traits> &std::operator <<<char,std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,const char *)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(700): or       'std::basic_ostream<_Elem,_Traits> &std::operator <<<char,std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,char)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(738): or       'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,const char *)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(785): or       'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,char)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(909): or       'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,const signed char *)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(916): or       'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,signed char)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(923): or       'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,const unsigned char *)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(930): or       'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,unsigned char)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(170): or       'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::basic_ostream<_Elem,_Traits> &(__cdecl *)(std::basic_ostream<_Elem,_Traits> &))'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(176): or       'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::basic_ios<_Elem,_Traits> &(__cdecl *)(std::basic_ios<_Elem,_Traits> &))'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(183): or       'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::ios_base &(__cdecl *)(std::ios_base &))'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(190): or       'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::_Bool)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(210): or       'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(short)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(243): or       'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(unsigned short)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(263): or       'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(__w64 int)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(288): or       'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(__w64 unsigned int)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(308): or       'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(long)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(328): or       'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(__w64 unsigned long)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(349): or       'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(__int64)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(369): or       'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(unsigned __int64)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(390): or       'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(float)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(410): or       'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(double)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(430): or       'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(long double)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(450): or       'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(const void *)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        d:\program files (x86)\microsoft visual studio 9.0\vc\include\ostream(470): or       'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::basic_streambuf<_Elem,_Traits> *)'1>        with1>        [1>            _Elem=char,1>            _Traits=std::char_traits<char>1>        ]1>        while trying to match the argument list '(std::ostream, std::string)'

解决办法：

增加头文件：#include <string>