C++ 错误 C2679：二进制“>>”：未找到采用“std::string”类型的右侧操作数的运算符（或没有可接受的转换）
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/1631338/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
error C2679: binary '>>' : no operator found which takes a right-hand operand of type 'std::string' (or there is no acceptable conversion)
提问by asyncwait
Please don't confuse with the title as it was already asked by someone but for a different context
请不要与标题混淆，因为它已经被某人询问过，但用于不同的上下文
The below code in Visual C++ Compiler (VS2008) does not get compiled, instead it throws this exception:
Visual C++ Compiler (VS2008) 中的以下代码未编译，而是引发此异常：
std::ifstream input (fileName);
while (input) {
string s;
input >> s;
std::cout << s << std::endl;
};
But this code compiles fine in cygwin g++. Any thoughts?
但是这段代码在 cygwin g++ 中编译得很好。有什么想法吗？
回答by sbi
Have you included all of the following headers?
您是否包含以下所有标题？
<fstream><istream><iostream><string>
<fstream><istream><iostream><string>
My guess is you forgot <string>.
我猜你忘了<string>。
On a side note: That should be std::coutand std::endl.
附带说明：那应该是std::cout和std::endl。
回答by Guy Avraham
Adding to @sbianswer, in my case the difference was including <string>instead of <string.h>(under VS 2017).
添加到@sbi答案中，在我的情况下，差异是包括<string>而不是<string.h>（在 VS 2017 下）。
See the following answer: similar case answer
见以下答案：类似案例答案
回答by Nick Delbar
In addition to what others said. The following code was necessary in my application to compile succesfully.
除了别人说的。我的应用程序需要以下代码才能成功编译。
std::cout << s.c_str() << std::endl;
Another work-around to this is go to project properties -> General -> Character Set and choose "Ues Multi-Byte Character Set" (You won't need to use c_str() to output the string)
另一个解决方法是转到项目属性 -> 常规 -> 字符集并选择“Ues 多字节字符集”（您不需要使用 c_str() 来输出字符串）
There's disadvantages to using MBCS so if you plan to localize your software, I'd advize against this.
使用 MBCS 有一些缺点，因此如果您打算本地化您的软件，我建议您不要这样做。
回答by Akshat Bhatt
include <string>
include <string>
Try including string header file along with <iostream>file.
It will work in some compilers even without the <string>because settings for different compilers are different and it is the compiler that is responsible for reading the preprocessor files that start with '#' symbol to generate a obj file.
尝试在<iostream>文件中包含字符串头文件。即使没有，它也可以在某些编译器中工作，<string>因为不同编译器的设置不同，并且编译器负责读取以“#”符号开头的预处理器文件以生成 obj 文件。
