#include 
                int main()
                {
                    int num,x,exponent,shift_left;
                    //x to determine division or multiplication
                    //shift left'*' by 2^
                    //shift right'/' by 2^
                    printf("num=");
                    scanf("%d",&num);
                    printf("Enter '1' to multiplication && '2' to division: ");
                    scanf("%d",&x);
                    switch(x)
                    {
                        case 1:
                        printf("exponent=");
                        scanf("%d",&exponent);
                        printf("%d*2^%d=%d",num,exponent,num<>exponent);
                        break;
                        default:printf("enter (1 or 2)");	 
                    }

                    return0;
                }