#include <stdio.h>
 int main()
{
	int a,b,c,l,e,f,g,h,i,j,k;
printf("please enter the pay code:1,2,3,4 or ctrl+z to end the program\n");

    while ( (a=getchar() ) !=EOF)
{
     switch(a)
{
        case'1':
		printf("enter the weekly salary\n");
        scanf("%d",&b);
		printf("%d",b);
    break;

		case'2':
		printf("enter the work of time\n");
		scanf("%d",&c);
        printf("enter the hourly wage\n");
	    scanf("%d",&l);
	if (c>40)
	{
		e=40*l+(c-40)*l*2.5;
	    printf("%d",e);
	}
	else
     {
		f=c*l;
	printf("%d",f);
	}
     break;

		case'3':
    printf("enter the weekly sales\n");
	scanf("%d",&g);
	h=250+g*0.057;
	printf("%d",h);
    break;

		case'4':
	printf("enter how many items do you have\n");
	scanf("%d",&i);
	printf("enter the money of the items\n");
    scanf("%d",&j);
       k=i*j;
	printf("%d",k);
	break;
}
}
	return 0;
}