PASS BY ADDRESS

Program to swap two numbers using pass by address.

#include<iostream.h>
#include<conio.h>
void swap(int *x,int *y);
void main()
{
  int a,b;
  clrscr();
  cout<<"Enter two numbers a & b"<<endl;
  cin>>a>>b;
  cout<<"\nBefore swapping:\n";
  cout<<"a="<<a;
  cout<<"\nb="<<b;
  swap(&a,&b);
  cout<<"\nAfter swapping:\n";
  cout<<"a="<<a;
  cout<<"\nb="<<b;
  getch();
}
void swap(int *x,int *y)
{
  int t;
  t=*x;
  *x=*y;
  *y=t;
}

output