Swapping of given variable without using temporary variable

 Program:

#include<stdio.h>

#include<conio.h>

void main()

{

    int a, b;

    clrscr();

    printf("Enter any Two Numbers : ");

    scanf("%d%d", &a, &b);

    printf("\nBefore Swapping :");

    printf("\na=%d", a);

    printf("\nb=%d\n\n", b);

    a=a+b;

    b=a-b;

    a=a-b;

    printf("After Swapping :");

    printf("\na=%d", a);

    printf("\nb=%d", b);

    getch();

}

Output:

Enter any Two Numbers : 5    10

Before Swapping :

a=5

b=10

After Swapping 

a=10

b=5

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