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Tip of the Day
Language: C++
Expertise: Intermediate
Feb 12, 2001

Accessing a Private Data Member from a Different Object


Different objects of the same class can access each other's members, even if these members are private. For example:
 
class A
{
 int n;
public:
 void f(A* p)  {p->n=0;}// another object's private member!
};

int main()
{
A a1,a2;
a1.f(&a2); // a1 changes a2's n
}

Typically, this coding style should be avoided. However, you should be aware that private members of an object can be changed by another object of the same type. Therefore, in certain special conditions, this coding style may be useful.
Danny Kalev
 
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