SWAP TWO NUMBERS WITHOUT USING A THIRD VARIABLE

Consider the following I/O samples.

SAMPLE INPUT : 600  1200

SAMPLE OUTPUT:  1200 600

C PROGRAM:

#include <stdio.h>
int main()
{
    int a,b,t;
    scanf("%d %d",&a,&b);
    printf("\nBefore swapping : A = %d B = %d",a,b);
    a=a+b-(b=a);
    printf("\nAfter swapping : A = %d B = %d",a,b);
    return 0;

}

ANOTHER METHOD: 

             a=a+b;

             b=a-b;

             a=a-b;

 

OUTPUT:

 

  

The given source code in C program is short and simple to understand. The source code is well tested in DEV-C++ and is completely error free. 
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