C Program Swap Two Numbers Without Temporary Variable

C Program Swap Two Numbers Without Temporary Variable :

//C Program Swap Two Numbers Without Temporary Variable

#include<stdio.h>
#include<conio.h>
void main()
{
int num1,num2;
clrscr();
printf("\n Enter I number:= ");
scanf("%d",&num1);
printf(" Enter II number:= ");
scanf("%d",&num2);
printf("\n before swap Num1 and Num2 is %d, %d",num1,num2);
num1=num1+num2;
num2=num1-num2;
num1=num1-num2;
printf("\n \n after swap Num1 and Num2 is %d, %d",num1,num2);
getch();
}

OUTPUT