c - 程序中的多个 scanf 导致 c 崩溃？

Question

#include <stdio.h>

int main()
{       
    printf("how old are you? ");
    int age = 0;
    scanf("%d", age);

    printf("how much does your daily habit cost per day? \n");
    int daily = 0;
    scanf("%d", daily); 

    double thisyear = daily * 365;

    printf("\n");
    printf("this year your habit will cost you: %.2f", thisyear);

    return 0;
}

这是我的学校计划，当我写这篇文章时，我试图让用户达到 1，给出他们的年龄和 2，他们的日常生活费用。但是当我运行这个程序时我的程序会崩溃

Answer 1

<罢工> scanf("%d", 每天);

需要成为

scanf("%d", &daily);

您需要将变量的地址(即指针，这是通过 & 完成的)传递给 scanf以便可以更改变量的值。这同样适用于您的其他提示。改成

scanf("%d", &age);

现在你应该在运行你的程序时得到这个:

% a.out
how old are you? 30
how much does your daily habit cost per day? 
20

this year your habit will cost you: 7300.00