C++ 错误 C2061：语法错误：标识符“字符串”
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error C2061: syntax error : identifier 'string'
提问by Michael
this is probably an include problem, i get these errors all over the code, and not only for string identifier for example error C2146: syntax error : missing ';' before identifier 'getName'and error C2146: syntax error : missing ';' before identifier 'name'
这可能是一个包含问题，我在整个代码中都遇到了这些错误，而不仅仅是例如字符串标识符error C2146: syntax error : missing ';' before identifier 'getName'和error C2146: syntax error : missing ';' before identifier 'name'
here's an example class:
这是一个示例类：
#include "stdafx.h"
class participant
{
public:
participant(int id, string name);
~participant(void);
int getId();
string getName();
private:
int id;
string name;
};
here's my stdafx.hfile:
这是我的stdafx.h文件：
#pragma once
#include "targetver.h"
#include <stdio.h>
#include <tchar.h>
#include <iostream>
#include <string>
#include <sstream>
#include <vector>
#include <list>
#include "day.h"
#include "appointment.h"
#include "extendedAppointment.h"
#include "participant.h"
#include "calendar.h"
using namespace std;
#define no_such_appointment_error 20;
#define conflicting_appointments_error 21;
#define noSuchDayError 22;
#define incorrectAppointmentError 23;
回答by Ed S.
So I compiled your code as-posted without your custom header files and it worked just fine. Based on that, I am going to wager that you have a problem in one of these header files:
因此，我在没有自定义头文件的情况下按原样编译了您的代码，并且运行良好。基于此，我敢打赌您在以下头文件之一中遇到了问题：
#include "day.h"
#include "appointment.h"
#include "extendedAppointment.h"
#include "participant.h"
#include "calendar.h"
It could be a macro, a class/struct not terminated with a semi-colon, etc. Check those out.
它可能是一个宏、一个不以分号结尾的类/结构等。检查一下。
Lastly, a few of tangential issues:
最后，一些切中要害的问题：
First, usinga namespace in a header file is a terrible idea. Any file that includes your header now has using namespace std;in it (this is bad). You probably don't want to include that many header files in every file that includes stdafx.h.
首先，using头文件中的命名空间是一个糟糕的主意。任何包含您的标题的文件现在都包含using namespace std;在其中（这很糟糕）。您可能不想在每个包含stdafx.h.
Secondly, once you remove that then stringimmediately becomes undefined (use std::string instead).
其次，一旦你删除它，然后string立即变得未定义（使用 std::string 代替）。
Last, why are your #defines ended with semi-colons? No need for that.
最后，为什么你的#defines 以分号结尾？不需要那个。
