缺少类型说明符 - 假定为 int。注意: C++ 不支持默认 int---->解决方法

写了一个对应让其出的错误（其实也挺不容易的喔 ）

错误如下：

1>d:\work\win32project\testeachotherclude\testeachotherclude\test2.h(9): error C2143: 语法错误 : 缺少“;”(在“*”的前面)
1>d:\work\win32project\testeachotherclude\testeachotherclude\test2.h(9): error C4430: 缺少类型说明符 - 假定为 int。注意: C++ 不支持默认 int
1>d:\work\win32project\testeachotherclude\testeachotherclude\test2.h(9): error C4430: 缺少类型说明符 - 假定为 int。注意: C++ 不支持默认 int
1>d:\work\win32project\testeachotherclude\testeachotherclude\test2.h(10): error C2061: 语法错误: 标识符“Test1”
1>d:\work\win32project\testeachotherclude\testeachotherclude\testeachotherclude.cpp(15): error C2660: “Test2::className”: 函数不接受 1 个参数
1>d:\work\win32project\testeachotherclude\testeachotherclude\testeachotherclude.cpp(16): error C2039: “test1”: 不是“Test2”的成员
1>          d:\work\win32project\testeachotherclude\testeachotherclude\test2.h(7) : 参见“Test2”的声明
1>d:\work\win32project\testeachotherclude\testeachotherclude\testeachotherclude.cpp(16): error C2227: “->refMe”的左边必须指向类/结构/联合/泛型类型

上传Test方便大家看：

main.cpp

#include "stdafx.h"#include "Test1.h"#include "Test2.h"int _tmain(int argc, _TCHAR* argv[]){Test1* t1=new Test1();Test2* t2=new Test2();t1->className(t2);t1->test2->refMe();t2->className(t1);t2->test1->refMe();return 0;}

再来看Test1的

Test1.h

#ifndef Test1_H#define Test1_H#include "Test2.h"class Test1{public:Test2* test2;void Test1::className(Test2* test2);void refMe();};#endif;

Test1.cpp

#include "Test2.h"void Test1::className(Test2* test2){this->test2=test2;std::cout<<"Test1  ";}void Test1::refMe(){std::cout<<"refMe Test1"<<std::endl;}

Test2.h

#ifndef Test2_H#define Test2_H#include "Test1.h"class Test2{public:Test1* test1;void className(Test1* test1);void refMe();};#endif

Test2.cpp

#include "StdAfx.h"#include "Test2.h"#include <iostream>void Test2::className(Test1* test1){this->test1=test1;std::cout<<"Test2  ";}void Test2::refMe(){std::cout<<"refMe Test2"<<std::endl;}

然后运行就报上面的一对错误了...

仔细看看发现两个头文件都彼此包含了，就是这个问题啦...那我们怎么解决了，上传我的代码，直接看这样更容易理解  main.cpp不变

Test1.h

#ifndef Test1_H#define Test1_H//#include "Test2.h" //用下面的方式替代class Test2;//注意：只是告诉编译器,需要这个类,其他功能结构等都没class Test1{public:Test2* test2;void Test1::className(Test2* test2);void refMe();};#endif;

 Test1.cpp

#include "StdAfx.h"#include "Test1.h"#include <iostream>#include "Test2.h" //注意：这里才是真正的包含void Test1::className(Test2* test2){this->test2=test2;std::cout<<"Test1  ";}void Test1::refMe(){std::cout<<"refMe Test1"<<std::endl;}

Tes2的我就不贴了，一样的道理，编译运行ok ....