*2.22（金融應用：貨幣單位）改寫程序清單2-10，解決將double轉int可能會造成精度損失問題。以整數值作為輸入，其最后兩位代表的是美分幣值

• 題目
• • 題目概述
  • 舉例
  • 程序清單2-10
  • 修改思路
• 代碼

題目

題目概述

*2.22（金融應用：貨幣單位）改寫程序清單2-10，解決將double轉int可能會造成精度損失問題。以整數值作為輸入，其最后兩位代表的是美分幣值

舉例

1156表示11美元56美分

程序清單2-10

import java.util.Scanner;public class Qingdan {public static void main(String[] args) {// Create a ScannerScanner input = new Scanner(System.in);// Receive the amountSystem.out.println("Enter an amount in double, for example 11.56");double amount = input.nextDouble();int remainingAmount = (int)(amount * 100);// Find the number of one dollarsint numberOfOneDollars = remainingAmount / 100;remainingAmount = remainingAmount % 100;// Find the number of quarters in the remaining amountint numberOfQuarters = remainingAmount / 25;remainingAmount = remainingAmount % 25;// Find the number of dimes in the remaining amountint numberOfDimes = remainingAmount / 10;remainingAmount = remainingAmount % 10;// Find the number of nickels in the remaining amountint numberOfNickels = remainingAmount / 5;remainingAmount = remainingAmount % 5;// Find the number of pennies in the remaining amountint numberOfPennies = remainingAmount;// Display resultsSystem.out.println("Your amount" + amount + " consists of");System.out.println(" " + numberOfOneDollars + " dollars");System.out.println(" " + numberOfQuarters + " quarters");System.out.println(" " + numberOfDimes+ " dimes");System.out.println(" " + numberOfNickels + " nickels");System.out.println(" " + numberOfPennies+ " pennies");} }

修改思路

找到從控制臺獲取數據的地方，更改賦值和下面語句變量即可

代碼

import java.util.Scanner;public class Test2_22 {public static void main(String[] args) {// Create a ScannerScanner input = new Scanner(System.in);// Receive the amountSystem.out.println("Enter an amount in int, for example 1156");int remainingAmount = input.nextInt();// Find the number of one dollarsint numberOfOneDollars = remainingAmount / 100;remainingAmount = remainingAmount % 100;// Find the number of quarters in the remaining amountint numberOfQuarters = remainingAmount / 25;remainingAmount = remainingAmount % 25;// Find the number of dimes in the remaining amountint numberOfDimes = remainingAmount / 10;remainingAmount = remainingAmount % 10;// Find the number of nickels in the remaining amountint numberOfNickels = remainingAmount / 5;remainingAmount = remainingAmount % 5;// Find the number of pennies in the remaining amountint numberOfPennies = remainingAmount;// Display resultsSystem.out.println("Your amount" + remainingAmount + " consists of");System.out.println(" " + numberOfOneDollars + " dollars");System.out.println(" " + numberOfQuarters + " quarters");System.out.println(" " + numberOfDimes+ " dimes");System.out.println(" " + numberOfNickels + " nickels");System.out.println(" " + numberOfPennies+ " pennies");} }

總結

以上是生活随笔為你收集整理的Java黑皮书课后题第2章：*2.22（金融应用：货币单位）改写程序清单2-10，解决将double转int可能会造成精度损失问题。以整数值作为输入，其最后两位代表的是美分币值的全部內容，希望文章能夠幫你解決所遇到的問題。

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