C语言 PETS SPA如何添加额外收费的选项，当用户选择小，中或大

xyhw6mcr 于 2022-12-03 发布在其他

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#include <stdio.h>

int main(void) {

int option;
int many;
char name;
float CNP = 20.00;

float TWS = 30.00;

float FG = 40.00;

float Many1 = 0.00;
float Many2 = 5.00;
float Many3 = 15.00;


while(1){

printf("-------------Welcome-------------\n");
printf("**********M.A.C PETS SPA*********\n");
printf("     choose from our Specials\n");
printf("---------------------------------\n");

printf("[1] CLEAN UP Special includes General shower and haircut - $20.00\n");
printf("-----------------------------------------------------\n");

printf("[2] THE WORKS Special includes General shower, haircut, ear cleaning, and nail trim - $30.00\n");
printf("-----------------------------------------------------\n");

printf("[3] FULL GROOM Special includes Breed appropriate shower, specific haircut, nail trim, ear cleaning, bandana and cologne - $40.00\n");
printf("-----------------------------------------------------\n");


printf("Enter your special: number:\n");
scanf("%d",&option);


if(option == 1)

{

printf("What size is your dog?: ");
printf("[1]: small\n");
printf("[2]: medium\n");
printf("[3]: Large\n");
scanf("%d\n",&many);

printf("Total Price including extra charge for the size is = $%.2f\n",(CNP+many) );

break;

}

else if(option == 2)

{

printf("What size is your dog?: \n");
printf("[1]: small\n");
printf("[2]: medium\n");
printf("[3]: Large\n");
scanf("%d",&many);

printf("Total Price including extra charge for the size is = $%.2f",TWS*many + (TWS*many*0.07) );

break;

}

else if(option == 3)  

{

printf("What size is your dog?: \n");
printf("[1]: small\n");
printf("[2]: medium\n");
printf("[3]: Large\n");

scanf("%d",&many);

printf("Total Price including extra charge for the size is = $%.2f",FG*many + (FG*many*0.07) );

break;

}


else printf("Invalid item number! Re-enter item number\n");

}

return 0;

}

我试图给予用户选择他们的狗的大小，并根据他们选择的大小添加额外的费用。我似乎不能得到它的权利，我觉得我需要创建另一个循环或使用struct我需要帮助，请！！
我尝试使用循环和输入让我们说，将是他们选择第一个选项，大小将是中等
则输出将为20.00加上15.00 = 35.00

c

来源：https://stackoverflow.com/questions/74407480/pets-spa-how-to-add-the-options-for-extra-charge-when-the-user-picks-small-mediu

1条答案

按热度按时间

k4ymrczo1#

您不希望scanf()字符串包含换行符。已重构以减少代码重复（当您澄清公式时，我将修改我的答案）：

#include <stdio.h>

struct option {
    char *string;
    float price;
};

float ask(const char *prompt, size_t n, const struct option options[n]) {
    for(;;) {
        printf("%s\n\n", prompt);
        for(int i = 0; i < n; i++) {
            printf("[%d] %s - $%.2f\n"
                "-----------------------------------------------------\n",
                i + 1,
                options[i].string,
                options[i].price
            );
        }
        printf("\n");
        int o;
        if(scanf("%d", &o) != 1) {
            printf("Option could not be read.\n\n");
            while(getchar() != '\n');
            continue;
        }
        printf("\n");
        for(int i = 0; i < n; i++) {
            if(o == i + 1)
                return options[i].price;
        }
        printf("Option %d was not valid.\n", o);
    }
}

int main(void) {
    for(;;) {
        float service = ask(
            "-------------Welcome-------------\n"
            "**********M.A.C PETS SPA*********\n"
            "     choose from our Specials\n"
            "---------------------------------",
            3,
            (const struct option []) {
                { "CLEAN UP Special includes General shower and haircut", 20 },
                { "THE WORKS Special includes General shower, haircut, ear cleaning, and nail trim", 30
                },
                { "FULL GROOM Special includes Breed appropriate shower, specific haircut, nail trim, ear cleaning, bandana and cologne", 40 }
            }
        );

        float size = ask(
            "What size is your dog?",
            3,
            (const struct option []) {
                { "Small", 0 },
                { "Medium", 5 },
                { "Large", 15 },
            }
        );

        printf("Total Price including extra charge for the size is = $%.2f\n\n", service + size);
    }
}

和运行示例：

-------------Welcome-------------
**********M.A.C PETS SPA*********
     choose from our Specials
---------------------------------

[1] CLEAN UP Special includes General shower and haircut - $20.00
-----------------------------------------------------
[2] THE WORKS Special includes General shower, haircut, ear cleaning, and nail trim - $30.00
-----------------------------------------------------
[3] FULL GROOM Special includes Breed appropriate shower, specific haircut, nail trim, ear cleaning, bandana and cologne - $40.00
-----------------------------------------------------

1

What size is your dog?

[1] Small - $0.00
-----------------------------------------------------
[2] Medium - $5.00
-----------------------------------------------------
[3] Large - $15.00
-----------------------------------------------------

x
Option could not be read.

What size is your dog?

[1] Small - $0.00
-----------------------------------------------------
[2] Medium - $5.00
-----------------------------------------------------
[3] Large - $15.00
-----------------------------------------------------

2

Total Price including extra charge for the size is = $25.00

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C语言 PETS SPA如何添加额外收费的选项，当用户选择小，中或大

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