我目前正在研究cs50的“现金”问题:估计需要支付一些零钱的硬币数量。
例如:0.41美元=1个25美分,1个10美分,1个5美分,1便士。
然而,当估计所需的硬币数量时,我最终得到的是便士,我认为这是由于我的错误,因为它似乎总是偏离一到两个硬币(便士)。
我已经包含了多个printf语句来尝试跟踪我可以做的事情,但是我似乎不明白为什么这个部门不能工作。
#include <cs50.h>
#include <stdio.h>
int main(void)
{
// change
float change = get_float("how much change is owed?: ");
int coins = 0;
//reprompt
while (change < 0)
{
change = get_float("how much change is owed?: ");
}
//quarter
float quarter = 0.25;
float quarters = change / quarter;
quarters = (int) quarters;
change = change - (quarters * quarter);
printf("%f quarters\n", quarters);
//dimes
float dime = 0.10;
float dimes = change / dime;
dimes = (int) dimes;
change = change - (dimes * dime);
printf("%f dimes\n", dimes);
//nickels
float nickel = 0.05;
float nickels = change / nickel;
nickels = (int) nickels;
change = change - (nickels * nickel);
printf("%f nickels\n", nickels);
printf("%f in change left change\n", change);
//pennies
float penny = 0.010000;
float pennies = change / penny;
pennies = (int) pennies;
change = change - (pennies * penny);
printf("%f pennies\n", pennies);
//coins
coins = quarters + dimes + nickels + pennies;
printf("%i\n", coins);
//printf("%f\n", change);
}
https://stackoverflow.com/questions/56130276
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