错误C2679：二进制 '<<'：没有操作员发现这需要型“的std :: string”

Question

代码的右手操作数：

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

    using namespace std; 
    int main() 
     { 
      ifstream fin ("ride.in.txt"); 
      ofstream fout ("ride.out.txt"); 
      int ta, tb;unsigned int i; 
      ta = tb = 1; 
      string a, b; 
      fin >> a >> b; 
      for (i = 0; i < a.size(); i++) 
       ta = ta * (a[i] - 'A' + 1) % 47; 
      for (i = 0; i < b.size(); i++) 
       tb = tb * (b[i] - 'A' + 1) % 47; 
      if (ta == tb) 
       fout << "GO" << endl; 
      else  
       fout << "STAY" << endl; 
      return 0; 
     } 

错误：

error C2679: 
binary '<<' : no operator found which takes a right-hand operand of type “std::string” 

Answer 1

我想问题是：

#include <string.h> 

变化：

#include <string> 

Answer 2

std::string运算符在<string>标题中定义。

标题<string.h>用于C风格的字符串函数。