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#include <iostream>
class A {
private:
int a;
public:
A() { a = 0; }
friend class B; // Friend Class
};
class B {
private:
int b;
public:
void showA(A& x)
{
std::cout << ""A::a="" << x.a;
}
};
int main()
{
A a;
B b;
b.showA(a);
}
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class Box
{
int capacity;
public:
void print();
friend void show();
bool compare();
friend bool lost();
};
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