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;
}