C program to show swap of two no’s without using third variable

				
					#include<stdio.h> 
#include<conio.h> 
void main() 
{ 
int a,b; 
clrscr(); 
printf(“enter value for a & b: ”); 
scanf(“%d%d”,&a,&b); 
a=a+b; 
b=a-b; 
a=a-b; 
printf(“after swapping the value of a & b: %d %d”,a,b);
getch(); 
}
				
			
Output:
 enter value for a & b: 4 5 
after swapping the value of a & b: 5 4

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