Answer Posted / rocky

#include<stdio.h>
void main()
{
int a,b,c,d;
printf("enter values
");
scanf("%d %d %d %d",&a,&b,&c,&d);
printf("before swapping
");
printf("%d %d %d %d",a,b,c,d);
a=(a+d);
d=(a-d);
a=(a-d);
c=(c+b);
b=(c-b);
c=(c-b);
printf("after swapping:%d %d %d %d",a,b,c,d);
}

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