int swap(int *a,int *b)

 int swap(int *a,int *b)

{

 *a=*a+*b;*b=*a-*b;*a=*a-*b;

}

main()

{

         int x=10,y=20;

    swap(&x,&y);

         printf("x= %d y = %d\n",x,y);

}

Answer

    x = 20 y = 10

Explanation

This is one way of swapping two values. Simple checking will help understand this.

Blog Author: Vijay Kumar

Go to: Java Aptitude, C C++ Aptitude