0312 复利计算

import java.util.Scanner;

public class text {
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        System.out.print("请选择（1为算本息，2为算本金）：");
        int number1 = scanner.nextInt();
        if (number1 == 1) {
            System.out.print("请输入本金：");
            float money = scanner.nextFloat();
            System.out.print("请输入年利率：");
            float rate = scanner.nextFloat();
            System.out.print("请输入年限：");
            int year = scanner.nextInt();
            System.out.print("请选择（1为复利计算，2为单利计算）：");
            int number2 = scanner.nextInt();
            if (number2 == 1) {
                for (int i = 1; i <= year; i++) {
                    money = (1 + rate) * money;
                }
                System.out.println("存入" + year + "年后的复利计算本息为：" + money);
            }
            if (number2 == 2) {
                money = money + money * rate * year;
                System.out.println("存入" + year + "年后的单利计算本息为：" + money);
            }

        }

        if (number1 == 2) {
            System.out.print("请输入本息：");
            float money = scanner.nextFloat();
            System.out.print("请输入年利率：");
            float rate = scanner.nextFloat();
            System.out.print("请输入年限：");
            int year = scanner.nextInt();
            System.out.print("请选择（1为复利计算，2为单利计算）：");
            int number2 = scanner.nextInt();
            if (number2 == 1) {
                float num = 1;
                for (int i = 1; i <= year; i++) {
                    num = num * (1 + rate);
                }
                money = money * (1 / num);
                System.out.println("复利计算需要存入的本金为：" + money);
            }
            if (number2 == 2) {
                money = money * (1 / (1 + rate * year));
                System.out.println("单利计算需要存入的本金为：" + money);
            }

        }

    }
}

运行结果：

功能：

可以用复利计算和单利计算分别求出本息或本金。