Question

我有我的代码，用户输入一定数量的金额，输出显示二十，十，五，一，四分之一，硬币，镍币和便士的数量，但我想要用户输入一定数量的硬币（例如36）并获得36美分的仅限硬币的数量。这意味着我应该得到1分，1分和1分。请有人帮我这个。非常感谢！

注意：
DecimalFormat类不是必需的

这是我的代码：

import java.util.Scanner;
import java.text.DecimalFormat;
public class Compu
{ 
public static void main(String[] args)
{
   Scanner input = new Scanner(System.in);
   DecimalFormat decimalFormat = new DecimalFormat("0.00");

    System.out.println("Please Enter an amount of Money:");       
    double change = input.nextDouble();


    int dollars = (int)change;
    int twenties = dollars / 20;
    int dollars1 = dollars % 20;
    int tens = dollars1 / 10;
    int dollars2 = dollars % 10;
    int fives = dollars2 / 5;
    int dollars3 = dollars % 5;
    int ones = dollars3;

    String moneyString = decimalFormat.format(change);
    String changeString = Double.toString(change); 
    String[] parts = moneyString.split("\\.");
    String part2 = parts[1]; 
    double cents5 = Double.parseDouble(part2);

    int cents = (int)cents5;
    int quarters = cents / 25;
    int cents1 = cents % 25;
    int dimes = cents1 / 10;
    int cents2 = cents % 10;
    int nickels = cents2 / 5;
    int cents3 = cents % 5;
    int pennies = cents3;

    System.out.println("Input entered by user: " + "$" + moneyString);


    System.out.println(twenties + " Twenties");
    System.out.println(tens + " Tens");
    System.out.println(fives + " Fives");
    System.out.println(ones + " Ones");
    System.out.println(quarters + " Quarters");
    System.out.println(dimes + " Dimes");
    System.out.println(nickels + " Nickels");
    System.out.println(pennies + " Pennies");

  }
}

Answer 1

模数运算符是你的朋友：

public static void main(String[] args) {
    Scanner input = new Scanner(System.in);
    System.out.println("Please enter amount in cents");
    double cents = input.nextInt();

    int numQuarters = cents / 25;
    int numDimes    = (cents % 25) / 10;
    int numNickels  = ((cents % 25) % 10) / 5;
    int numPennies  = ((cents % 25) % 10) % 5;

    System.out.println(quarters + " Quarters");
    System.out.println(dimes    + " Dimes");
    System.out.println(nickels  + " Nickels");
    System.out.println(pennies  + " Pennies");
}

Answer 2

为此，请完全删除处理美元的程序部分，并将用户输入直接输入'美分'。

此外，这部分：

int cents = (int)cents5;
int quarters = cents / 25;
int cents1 = cents % 25;
int dimes = cents1 / 10;
int cents2 = cents % 10;
int nickels = cents2 / 5;
int cents3 = cents % 5;
int pennies = cents3;

不准确（在少数情况下。并非全部），因为您没有更改'美分'的值。因此，如果输入'36'，它将返回1个四分之一（25），1个角钱（35），1个镍（40）和1个便士（41）。

要避免这种情况，请使用以下代码：

int cents = (int)cents5;
int quarters = cents / 25;
int cents1 = cents % 25;
int dimes = cents1 / 10;
int cents2 = cents1 % 10;
int nickels = cents2 / 5;
int cents3 = cents2 % 5;
int pennies = cents3;

如何获得Java中的硬币数量？

2 个答案: