急 求高手解答！！自己运行就可以，测试就每次都说超时，什么原因啊？

#include<stdio.h>

int item[200];            
double price[10]={4.5,6.9,8.1,9.1,10.1,3.8,4.0,6.9,3.2,5.6};
double total=0;   
int i;        


void setMeal(int set)
{
    int n=0;
    int setItem[50];
    double setTotal=0.000;
    if(set==11)
        {
        printf("Choose 1 item from (1-5) :");
        scanf("%d",&setItem[n]);
        while(setItem[n]<1 || setItem[n]>5)
                {
            printf("Invalid item, please enter again\n");
            scanf("%d",&setItem[n]);
        }
        setTotal+=price[setItem[n]-1];
        n++;   
        printf("Choose 1 item from (6-8) :");
        scanf("%d",&setItem[n]);
        while(setItem[n]<6 || setItem[n]>8)
                {
            printf("Invalid item, please enter again\n");
            scanf("%d",&setItem[n]);
        }
        setTotal+=price[setItem[n]-1];
        n++;   
        printf("Choose 1 item from (9-10) :");
        scanf("%d",&setItem[n]);
        while(setItem[n]<9 || setItem[n]>10)
                {
            printf("Invalid item, please enter again\n");
            scanf("%d",&setItem[n]);
        }
        setTotal+=price[setItem[n]-1];
        n++;   
        setTotal=setTotal*0.98;
    }
    if(set==12)
        {
        printf("Choose 1 item from (1-5) :");
        scanf("%d",&setItem[n]);
        while(setItem[n]<1 || setItem[n]>5)
                {
            printf("Invalid item, please enter again\n");
            scanf("%d",&setItem[n]);
        }
        setTotal+=price[setItem[n]-1];
        n++;   
        printf("Choose 1 item from (9-10) :");
        scanf("%d",&setItem[n]);
        while(setItem[n]<9 || setItem[n]>10)
                {
            printf("Invalid item, please enter again\n");
            scanf("%d",&setItem[n]);
        }
        setTotal+=price[setItem[n]-1];
        n++;   
        setTotal=setTotal*0.99;
    }
    if(set==13)
        {
        printf("Choose 2 items from (1-5) :");
        scanf("%d",&setItem[n]);
        while(setItem[n]<1 || setItem[n]>5)
                {
            printf("Invalid item, please enter again\n");
            scanf("%d",&setItem[n]);
        }
        setTotal+=price[setItem[n]-1];
        n++;   
        scanf("%d",&setItem[n]);
        while(setItem[n]<1 || setItem[n]>5)
                {
            printf("Invalid item, please enter again\n");
            scanf("%d",&setItem[n]);
        }
        setTotal+=price[setItem[n]-1];
        n++;   
        printf("Choose 1 item from (6-8) :");
        scanf("%d",&setItem[n]);
        while(setItem[n]<6 || setItem[n]>8)
                {
            printf("Invalid item, please enter again\n");
            scanf("%d",&setItem[n]);
        }
        setTotal+=price[setItem[n]-1];
        n++;   
        printf("Choose 2 items from (9-10) :");
        scanf("%d",&setItem[n]);
        while(setItem[n]<9 || setItem[n]>10)
                {
            printf("Invalid item, please enter again\n");
            scanf("%d",&setItem[n]);
        }
        setTotal+=price[setItem[n]-1];
        n++;   
        scanf("%d",&setItem[n]);
        while(setItem[n]<9 || setItem[n]>10)
                {
            printf("Invalid item, please enter again\n");
            scanf("%d",&setItem[n]);
        }
        setTotal+=price[setItem[n]-1];
        n++;   
        setTotal=setTotal*0.95;
    }
    total+=setTotal;
}



void main()
{
    float paid;
    float change;

    for(i=0;item[i-1]!=-1;i++)
        {
        scanf("%d",&item[i]);
        setMeal(item[i]);

        if(item[i]>13||item[i]<-1)
            printf("Invalid item, please enter again\n");
               
        if(item[i]==-1)
                {        
            printf("Total: $%.1f\n",total);    //show total price
            
            printf("Pay:");
            scanf("%f",&paid);
            while(paid<total)
                        {
                printf("Not enough payment, please enter again\n");
                scanf("%f",&paid);
            }
            change=paid-total;
            printf("Change: %.1f\n",change);
        
        }
        
        total+=price[item[i]-1];
    }
}

没人理呜呜呜。。。
真的很急的。。。。。。
还是我这个程序写的太白痴了。。。。。

原题描述更长。。。。大致就是输入东西的序号然后输出对应的价格总和，指定的set可以打折。。。。。

没有网址的说。。。。。。。。。。。。。。。。。。。。。。。。