作业3（6）查询水果的单价。有 4 种水果，苹果（apples）、梨（pears）、桔子（oranges）和葡萄（grapes），

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

    for(i=1;i<=5;i++){
        printf("[1] Select apples 
");
        printf("[2] Select pears 
");
        printf("[3] Select oranges 
");
        printf("[4] Select grapes 
");
        printf("[0] exit 
");

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

        if(choice==0)
            break;

        switch(choice){/*利用switch，break显示各项*/
        case 1:price=3.00;
            break;
        case 2:price=2.50;
            break;
        case 3:price=4.10;
            break;
        case 4:price=10.20;
            break;
        }

        printf("price=%.2f
",price);
    }
    printf("Thanks 
");

    return 0;
}