basic

program to swap two values A & B without using third variable
#include<stdio.h>
#include<conio.h>

void main()

{

 clrscr();

int a,b;

 printf("\n enter number a:");

scanf("%d",&a);

 

printf("\n enter number b:"); 

scanf(%d",&b);

 a = a + b;

 b = a - b; 

a = a - b; 

printf(" \n result a : =%d",a);

printf(" \n result b : =%d",b);



getch();

}