第三章例3-8

#include<stdio.h>
int main(void)
{
   int choice,i;
   double price;

   for(i=1;i<=5;i++){
        printf("[1]Select crisps\n");
        printf("[2]Select popcorn\n");
        printf("[3]Select chocolate\n");
        printf("[4]Select cola\n");
        printf("[0]exit\n");

         printf("Enter choice:");
         scanf("%d",&choice);

         if(choice==0)
            break;
         switch(choice){
             case 1:price=3.0;break;
             case 2:price=2.5;break;
             case 3:price=4.0;break;
             case 4:price=3.5;break;
             default:price=0.0;break;
         }
          printf("price=%0.1f\n",price);
       }
          printf("Thanks\n");
          return 0;
      }