c - 是和否用 C 语言回答

Question

我正在尝试制作一个 C 程序，我可以在其中询问以下用户是或否的问题:

Do you like beer? Y or N

Are you old enough? Y or N

How old are you?

如果用户说超过 18 岁，打印消息:我们去喝点啤酒吧

但是如果前 2 个问题中的一个或年龄是 N，打印:sorry maybe next time

我认为问题出在 If 语句上，也许我没有封装条件。

#include <stdio.h>

int main(){

    char answer;
    int age = 0 ;

    printf("Do you like beers Enter Y or N: \n");
    scanf(" %c", &answer);
    printf("\n so your answer is %c\n", answer);

    printf("Are you old enough to have a beer?\n");
    scanf(" %c", &answer);
    printf("\n so your answer is %c\n", answer);


    if (answer == 'Y') {

        printf("how old are you?\n");
        scanf(" %d", &age);

        if (age >= 18)
            printf("\n Let's go for some beers , I will pay the first round \n");

    }if else  (age < 18 && answer == 'N')
        printf("\n sorry my friend , maybe next time \n");



       // printf("You may NOT ");

  return 0;

}

Answer 1

从上面的代码片段来看，您的 else 语句格式似乎不正确(if else 而不是 else if)。此外，由于您正在测试 either 问题是否为假，因此您应该使用 || 操作数。所以你会想做这样的事情:

else if  (age < 18 || answer == 'N')