1 #include <bits/stdc++.h> 2 using namespace std; 3 class A 4 { 5 public: 6     A() 7     { 8         a=b=0; 9         cout<<"Default Constructor called.\n";10     }11     A(int i,int j)12     {13         a=i;14         b=j;15         cout<<"Constructor called.\n";16     }17     ~A()18     {19         cout<<"Destructor callled.\n";20     }21     void copy(A &aa);22     void print()23     {24         cout<<a<<","<<b<<endl;25     }26 private:27     int a,b;28 };29 void A::copy(A &aa)30 {31     if(this==&aa)32         return;33     *this=aa;34 }35 int main()36 {37     A a1,a2(3,4);38     a1.copy(a2);39     a1.print();40 }