ホテルルーム料金プログラム(C言語)

CodeBlocks 17.12でテスト済み

#ifndef HOTEL_H_INCLUDED
#define HOTEL_H_INCLUDED

#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 "*******************************"

// 
int menu(void);

// 
int getnights(void);

// 
void showprice(double, int);

#endif // HOTEL_H_INCLUDED

#include 
#include "hotel.h"

int menu(void)
{
    int code, status;

    printf("
%s%s
", STARS, STARS);
    printf(" :
");
    printf("1)   2)  
");
    printf("3)   4)  
");
    printf("5)  
");
    printf("%s%s
", STARS, STARS);
    while((status = scanf("%d", &code)) != 1 || (code < 1 || code > 5))
    {
        if(status != 1)
            scanf("%*s");
        printf(" 1 5 
");
    }
    return code;
}

int getnights(void)
{
    int nights;

    printf(" ？
");
    while(scanf("%d", &nights) != 1)
    {
        scanf("%*s");
        printf(" ， ：2.
");
    }
    return nights;
}

void showprice(double rate, int nights)
{
    int n;
    double total = 0.0;
    double factor = 1.0;
    for(n = 1; n <= nights; n++, factor *= DISCOUNT)
        total += rate * factor;
    printf("  %0.2f 。
", total);
}

#include 
#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!
");
                break;
        }
        nights = getnights();
        showprice(hotel_rate, nights);
    }
    printf(" ， 。
 ");
    system("pause");
    return 0;
}