cycle1.2_q_3.cpp

/*
3. Write a function called swap() that interchanges two int values belonging
to an object, passed as parameter to it by the calling program. Write a C++
program to demonstrate call by value, call by reference and call by
address.
*/
#include <iostream>
#include <cctype>
using namespace std;

class swaping{
int x,y;
public:
    void get_data(){
    cout<<"Enter the X and Y \n";
    cin >> x >> y;
    }
    void swap_value(swaping s);
    void swap_ref(swaping &s);
    void swap_add(swaping *s);
    void output(){
    cout <<"x ="<<x<<"\n"<<"y= "<<y<<endl;
    }
};
void swaping :: swap_value(swaping s){
int temp;
temp=s.x;
s.x=s.y;
s.y=temp;
}

void swaping::swap_ref(swaping &s){
int temp;
temp=s.x;
s.x=s.y;
s.y=temp;
}

void swaping::swap_add(swaping *s){
int temp;
temp=s->x;
s->x=s->y;
s->y=temp;
}

int main (){
    char fun;
swaping s1,s2;
s1.get_data();
while(fun!='E'){
  cout<<"Enter \n V for Call_by_value \n R for Call_by_Reference\n A for Call_by_Address \n E for exit"<<endl;
cin>>fun;
fun=toupper(fun);
cout<<"Before Swapping \n" ;
s1.output();
switch(fun){
case 'V':s2.swap_value(s1);
break;
case 'R':s2.swap_ref(s1);
break;
case 'A':s2.swap_add(&s1);
break;
default:cout<<"\n INVALID CHOICE \n";
}
cout<<"After Swapping \n" ;
s1.output();
}

}