程序代码：

//hotel.cpp的代码
#include <stdio.h>

 #include "hotel.h"

 int menu (void)

 {
     int code,status;
     printf("\n%s%s\n",STARS,STARS);
     printf("Enter the number of the desired hotl: \n");
     printf("1)Faorfoe;d Ar,s    2)Hotel Olympic\n");
     printf("3)Cherworthy plaza    4)The Stockton\n");
     printf("5)quit\n");
     printf("\n%s%s\n",STARS,STARS);
     while ((status = scanf("%d",&code)) != 1 || (code <1 || code >5))
     {
         if (status != 1)
             scanf("%*s");
         printf("Enter an integer from 1 to 5,please\n");
     }
     return code;

 }

 int getnights(void)

 {
     int nights;
     printf("How many nights are needed? ");
     while (scanf("%d",&nights) != 1)
     {
         scanf("%*s");
         printf("please enter an integer,such as 2.\n");
     }
     return nights;

 }


void showprice (double rate,int nights)

 {
     int n;
     double total = 0.0;
     double factot = 1.0;
     for (n = 1;n <= nights;n++,factot *= DISCOUNT)//你用你原来的代码与这里标记红色的代码看看，肯定不一致，这应该是你编译不通过的原因了
         total += rate * factot; //字符与上面的要一致 ，你原先的那些代码应该是这里错了，你原先的代码这里是factor,而上面定义的是factot
     printf("The total cost will be $%0.2f\n",total);

 }


//main.cpp的代码
#include <stdio.h>

 #include "hotel.h"

 int main (void)

 {
     int nights;
     double hotel_rate;
     int code;
     while ((code = menu()) != QUIT)
     {
         switch(code)
         {
         case 1:hotel_rate = HOTEL1;
                 break;
         case 2:hotel_rate = HOTEL2;
                 break;
         case 3:hotel_rate = HOTEL3;
                 break;
         case 4:hotel_rate = HOTEL4;
                 break;
         default:hotel_rate = 0.0;
                 printf("Oops!\n");
                 break;
         }
         nights = getnights();
         showprice (hotel_rate,nights);
     }
     printf("Thank you and goodbye\n");
     return 0;

 }



//hotel.h的代码
#define QUIT 5

 #define HOTEL1 80.00

 #define HOTEL2 125.00

 #define HOTEL3 155.00

 #define HOTEL4 200.00

 #define DISCOUNT 0.95

 #define STARS "****************"

 //给出选项列表
 int menu (void);

 //返回规定的天数
 int getnights (void);

 //按饭店的星级和预订的天数计算价格并显示出来
 void showprice (double,int);