CodeWithHarry_Cpp_OOPS/26Q.cpp at master · harryboi17/CodeWithHarry_Cpp_OOPS · GitHub

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#include <iostream>
using namespace std;

class c2;

class c1{
    int val;
    friend void exchange(c1 &, c2 &);
    public:
        void inData(int a){
            val = a;
        }

        void display(void){
            cout<<val<<endl;
        }
};

class c2{
    int val2;
    friend void exchange(c1 &, c2 &);
    public:
        void inData(int a){
            val2 = a;
        }

        void display(void){
            cout<<val2<<endl;
        }
};

void exchange(c1 &x, c2 &y){
    int temp = x.val;
    x.val=y.val2;
    y.val2 = temp;
}

int main(){
    c1 oc1;
    c2 oc2;

    oc1.inData(34);
    oc2.inData(64);
    exchange(oc1, oc2);

    cout<<"the value after exchaging becomes: ";
    oc1.display();
    cout<<"the value after exchaging becomes: ";
    oc2.display();

return 0;
}