复利计算程序之最新版
程序源代码已上传至https://github.com/ganjiaping/ganjiaping.git,同时Github上的Wiki页面,有说明如何部署运行该项目/程序。
源程序如下:
import java.util.*; public class FuLiLast { public static double b, l, n, h; // 计算本息和 public static void Benxihe() { double sum1, sum2; Scanner scanner = new Scanner(System.in); System.out.println("请输入本金: "); b = scanner.nextDouble(); System.out.println("请输入年利率: "); l = scanner.nextDouble(); System.out.println("请输入年数: "); n = scanner.nextInt(); sum1 = (float) (b * Math.pow(1 + l, n)); sum2 = b * (1 + l * n); System.out.println("复利的本息和为: " + (double) (Math.round(sum1 * 100) / 100.0)); System.out.println("单利的本息和为: " + (double) (Math.round(sum2 * 100) / 100.0)); } // 计算本金 public static void Benjin() { Scanner scanner = new Scanner(System.in); System.out.println("请输入年利率: "); l = scanner.nextDouble(); System.out.println("请输入年数: "); n = scanner.nextInt(); System.out.println("请输入本息和: "); h = scanner.nextDouble(); b = (float) (h * 1 / Math.pow(1 + l, n)); System.out.println("本金为: " + (double) (Math.round(b * 100) / 100.0)); } // 计算年数 public static class Logarithm { public static double log(double value, double base) { return Math.log(value) / Math.log(base); } } public static void Nianshu() { Scanner scanner = new Scanner(System.in); System.out.println("请输入本金: "); b = scanner.nextDouble(); System.out.println("请输入年利率: "); l = scanner.nextDouble(); System.out.println("请输入本息和: "); h = scanner.nextDouble(); n = Logarithm.log(h / b, 1 + l); n = Math.ceil(n); System.out.println("需要存的年数为: " + Math.ceil(n)); } // 计算年利率 public static void Lilu() { Scanner scanner = new Scanner(System.in); System.out.println("请输入本金: "); b = scanner.nextDouble(); System.out.println("请输入年数: "); n = scanner.nextInt(); System.out.println("请输入本息和: "); h = scanner.nextDouble(); l = Math.pow(h / b, 1.0 / n) - 1; System.out .println("年报酬率为: " + (double) (Math.round(l * 1000) / 1000.0)); } // 计算本利之和连同年金投资后的总资产值 public static void Nianzongzhi() { Scanner scanner = new Scanner(System.in); System.out.println("请输入每年定投资金: "); b = scanner.nextDouble(); System.out.println("请输入年利率: "); l = scanner.nextDouble(); System.out.println("请输入年数: "); n = scanner.nextInt(); h = b * (1 + l) * (Math.pow(1 + l, n) - 1) / l; System.out.println("年资产总值为:" + (double) (Math.round(h * 100) / 100.0)); } // 计算每月等额本息还款 public static void BenxiHuankuan() { double h, l, b; int n; Scanner scanner = new Scanner(System.in); System.out.println("请输入贷款金额: "); h = scanner.nextDouble(); System.out.println("请输入年利率: "); l = scanner.nextDouble(); System.out.println("请输入贷款年数: "); n = scanner.nextInt(); l = l / 12; n = n * 12; b = h * l * Math.pow(1 + l, n) / (Math.pow(1 + l, n) - 1); System.out.println("每月等额本息还款为:" + (double) (Math.round(b * 10000) / 10000.0)); } public static void main(String[] args) { int choice; while (true) { System.out.println("\t\t|------------------|"); System.out.println("\t\t| 1.求本息和 |"); System.out.println("\t\t| 2.求本金 |"); System.out.println("\t\t| 3.求年数 |"); System.out.println("\t\t| 4.求年利率 |"); System.out.println("\t\t| 5.求年资产总值 |"); System.out.println("\t\t| 6.求等额本息还款 |"); System.out.println("\t\t| 7.退出 |"); System.out.println("\t\t|------------------|"); Scanner scanner = new Scanner(System.in); System.out.println("请输入你的选择(1~7): "); choice = scanner.nextInt(); switch (choice) { case 1: Benxihe(); break; case 2: Benjin(); break; case 3: Nianshu(); break; case 4: Lilu(); break; case 5: Nianzongzhi(); break; case 6: BenxiHuankuan(); break; case 7: System.out.println("欢迎再次使用!"); System.exit(0); break; default: { System.out.println("出错了!"); break; } } } } }
运行结果如下:
posted on 2016-03-21 21:56 ganxiaoxiao 阅读(621) 评论(0) 编辑 收藏 举报