call by reference

Prog 12 : Write a Program to swap two values using call by reference

#include<iostream.h>

#include<conio.h>

#include&ltiomainp.h>
void swap(int *,int *);
void swap(int *a,int *b)

{

int c;

c=*a;

*a=*b;

*b=c;

}

void main()

{

clrscr();

int a,b;

cout<<"\n Enter value of a";

cin >>a;

cout<<"\n Enter value of b";

cin >>b;

cout<<"\n before swapping a and b are";

cout<<"\n a="<<a"b="<<b;

cout<<"\n After swapping a and b are";

cout<<"\n a="<<a"b="<<b;

}

Output:

Enter value of a 10

Enter value of b 20

before swapping a and b are a=10

b=20

After swapping a and b are a=20

b=10