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零钱硬币。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。我无法为之困惑,我非常困惑...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;
}
答案 0 :(得分:1)
这是一件小事,但我只是看不到... 删除该属性而不在上面添加换行符会在输入后立即带来答案,因此在我看来,这是一个多余的数字并且缺少解决方案(令人尴尬的是,我知道...哈哈)。基本上:
$ ./cash3
Enter dollar amount with format 0.00: $1.12
7
0
...成为...
Enter dollar amount with format 0.00: $1.12
Your input: $ 1.127
0
有时候想要靠近树木,会让您想念整个森林,哈哈 感谢Blauelf为此提供的帮助和解决方案!