SWAP two value using reference variable in C++

Prog 5: Write a program to swap two value using reference variable

#include<iostream.h>

#include<conio.h>

void main()

{

clrscr();

int A,B,temp;

cout<<"\n Enter the value of A";

cin>>A;

cout<<"\n Enter the value of B";

cin>>B;

int &P=A;
int &Q=B; 
temp=P; 
P=Q;
Q=temp;
cout<<"After swaping"<<endl;

cout<<"A ="<<A<<endl;
cout<<"A ="<<A<<endl;

}

Output:

Enter the value of A

10

Enter the value of B

20

After swapping A & B are: A =20

B =10