如何在C++中訪問基類的成員變量？

Question

我試圖訪問基類的成員變量.. 如何做到這一點？

=====================以下是ClassA（父類）================== =========

class ClassA 
{ 
public: 
    int member_Var; // Parent member_var 

    ClassA(); 
    ~ClassA(); 
    void ClassA::initProcess(); 
}; 

ClassA::ClassA(){} 
ClassA::~ClassA(){} 

void ClassA::initProcess() 
{ 
    member_Var = 20; 
} 

=================以下是ClassA的子類的ClassB =========== =====

class ClassB : public ClassA 
{ 
public: 
    int member_Var; // Subclass member_var 

    ClassB(); 
    ~ClassB(); 

    void ClassB::initProcess(); 
}; 

ClassB::ClassB(){} 
ClassB::~ClassB(){} 

void ClassB::initProcess() 
{ 
    ClassA->member_Var = 10; // Is this correct? or How to access base instances's member variable? 
    member_var = 100; 
} 

Answer 1

您需要指定ClassA::member_Var以顯式引用基類中的那個。

void ClassB::initProcess() 
{ 
    ClassA::member_Var = 10; 
    member_var = 100; 
}