C ++无效使用非静态数据成员 [英] C++ Invalid use of non-static data member

问题描述

我正在开发C ++应用程序，但出现错误无效使用非静态数据成员C ++ .我已经发布了所有与错误相关的代码.如果有人能指出我的愚蠢，我将不胜感激.谢谢！

I'm developing c++ application there I'm getting the error Invalid use of non-static data member C++. I have posted all the code which is related The error. I would be very grateful if anyone could point out my stupidity. Thanks!

Const2DCDP.h

Const2DCDP.h

class Const2DCDP{
public:

    int *ex;

};

2DCPDP4.h

2DCPDP4.h

#include "Const2DCDP.h"

    class CDP{
    }

2DCPDP4.cpp

2DCPDP4.cpp

#include "2DCDP4.h"

    void CDP::Release()
    {

        if(Const2DCDP::ex != NULL){  // Invalid use of non static data //member 'ex'
            free(ex);
            ex = NULL;
        }      
    }

推荐答案

您正在使用的数据成员( ex )不是静态成员.因此，不能在类名称上调用它，您需要一个类 instance 才能使用它.

The data member (ex) you are using is not a static member. So it cannot be called on the class name, you need a class instance to use it.

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