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;
}