练习3-8 查询水果价格（15 分）

#include

int main()
{
    printf("[1] apple\n[2] pear\n[3] orange\n[4] grape\n[0] exit\n");

    int i,num;

    for(i=0;i<=4;i++){

        scanf("%d",&num);

        if(num==0){
            break;
        }

        switch(num){

            case 1:printf("price = 3.00\n");
            break;

            case 2:printf("price = 2.50\n");
            break;

            case 3:printf("price = 4.10\n");
            break;

            case 4:printf("price = 10.20\n");
            break;

            default:printf("price = 0.00\n");
            break;
        }
    }

    return 0;
}