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我完成了挑战,我的第一个 C 代码显然运行良好,每次都返回正确的最小硬币数量。然后,当我尝试“清理”一下并删除多余的 printf 时,一切似乎都出错了。我无法解决这个问题,我很困惑......为什么会发生这种情况?

#include <cs50.h>
#include <stdio.h>
#include <math.h>

int q = 25; //variable for quarters
int d = 10; //dimes
int n = 5;  //nickels
int p = 1;  //pennies

int x;  //variable for final result
int r;  // variable for the reminder

float amount(string prompt);

int main(void)
{
    float a = amount("Enter dollar amount with format 0.00: $");
    int cents = round(a * 100);
    printf("Your input: $ %.2f", a);
    // printf(", which amounts to %i total.\n", cents); //WHY DELETING THIS LINE MESSES UP WITH THE FLOAT AND THE RESULT?

    x = cents / q;
    r = cents % q;

    x = x + (r / d);
    r = r % d;

    x = x + (r / n);
    r = r % n;

    x = x + (r / p);
    printf("%i\n", x);
    r = r % p;
    printf("%i\n", r);
}

float amount(string prompt)
{
    float a;
    do {
        a = get_float("%s", prompt);
    }
    while (a <= 0);
    return a;
}
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1 回答 1

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这是一件小事,但我只是看不到它...删除该庄园而不在上面添加换行符会在输入之后立即带来答案,因此在我看来它是一个神秘的额外数字和缺失的解决方案(我很尴尬知道...哈哈)。基本上:

 $ ./cash3
Enter dollar amount with format 0.00: $1.12
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……变成……

Enter dollar amount with format 0.00: $1.12
Your input: $ 1.127
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有时想要靠近树木会让你错过整个森林哈哈感谢 Blauelf 的帮助和解决方案!

于 2019-06-19T13:12:43.670 回答