CALL BY REFERENCE

SOURCE CODE:
#include<iostream.h>
#include<conio.h>
void swap(int &x,int &y)
{
int temp;
temp=x;
x=y;
y=temp;
cout<<"\n The value of a and b in swap fun is\t "<<x<<"\t"<<y;
}
void main()
{
int a,b;
clrscr();
cout<<"\n Enter the value of a and b:\n";
cin>>a>>b;
cout<<"\n The value of a and b before the swap fun is:\t"<<a<<"\t"<<b;
swap(a,b);
cout<<"\n\n The value of a and b after the swap fun is:\t"<<a<<"\t"<<b;
getch();
}

OUTPUT:

Enter the value of a and b:

4
3

The value of a and b before the swap fun is:4      3

The value of a and b in swap fun is: 3    4
The value of a and b after the swap fun is:4        3
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