How to access private members of a private type in c++?

by keegan.towne , in category: General Help , 2 months ago

How to access private members of a private type in c++?

Facebook Twitter LinkedIn Telegram Whatsapp

1 answer

by wayne.swaniawski , 2 months ago

@keegan.towne 

In C++, private members (variables or functions) can only be accessed within the scope of the class in which they are declared. This means that you cannot access private members of a private type directly from outside the class.


However, you can provide public member functions within the class that allow access to the private members indirectly. These public member functions can be used to retrieve or modify the private members. Here's an example:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
class MyClass {
private:
    int privateMember;
    
public:
    void setPrivateMember(int value) {
        privateMember = value;
    }
    
    int getPrivateMember() {
        return privateMember;
    }
};

int main() {
    MyClass obj;
    obj.setPrivateMember(42);
    int result = obj.getPrivateMember();
    // Now 'result' will contain the value of the private member.
    return 0;
}


In this example, the private member privateMember can only be accessed through the public member functions setPrivateMember() and getPrivateMember(). These functions provide controlled access to the private member while maintaining encapsulation and data hiding.