我在为 Java 类构建的更改机器时遇到问题。我对编程很陌生,所以这可能是一个愚蠢的逻辑错误。我的找零机要求用户输入商品的价格,然后输入支付的金额,然后它应该计算用户将收到多少硬币、一毛钱等......但是,它每次只计算 1 个硬币。代码如下:
import java.util.Scanner;
import java.text.*;
public class Main {
public static void main(String[] args)
{
float penny = .1F, nickel = .5F, dime = .10F, quarter = .25F;
int pennyCtr = 0, nickelCtr = 0, dimeCtr = 0, quarterCtr = 0;
Scanner scan = new Scanner(System.in);
System.out.println("Enter Purchase Price: ");
float price = scan.nextFloat();
DecimalFormat paidFormat = new DecimalFormat("0.00");
System.out.println("Enter Amount Paid: ");
float paid = scan.nextFloat();
float change = (float) (paid - price);
System.out.println("Your change from $" + paidFormat.format(paid)
+ " is: " + change);
if (change >= .25)
{
change -= quarter;
quarterCtr++;
}
else if (change < .25)
{
change -= dime;
dimeCtr++;
}
else if (change < .10)
{
change -= nickel;
nickelCtr++;
}
else if (change < .5)
{
change -= penny;
pennyCtr++;
}
System.out.println("Your change from $" + paidFormat.format(paid) +
" is: " + quarterCtr + " Quarters, " + dimeCtr + " Dimes, "
+ nickelCtr + " Nickles, " + pennyCtr + " Pennies. ");
System.out.println("Program written by Ashley ");
}
}
最佳答案
一些一般提示:
- 看看您如何声明变量,尤其是 penny 和 Nick。
- 看看您如何计算变化。是这样吗?
- 您需要一个
while
循环。应该循环多长时间?循环什么时候结束? - 当您打印“您的零钱来自...”时,请考虑如何整齐地输出零钱。
- Google 一些关于浮点减法的问题 - 它并不像乍看起来那么简单!考虑使用
double
代替您的声明和输入。
关于java - 仅更改机器计数区,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/18366578/