JAVA语言程序设计 第8版 复习题2.13 求高人指点

Question

javaSE

Answer 1

import java.util.Scanner;public class Test{
public static void main(String[] args){
// Create an new Scanner
Scanner input=new Scanner(System.in); //提示输入投资总额
System.out.print("Enter investement amount:");
double investmentAmount=input.nextDouble(); //提示输入月利率
System.out.print("Enter annual interest rate:");
double annualInvestmentRate=input.nextDouble()*0.01; //提示输入投资年限
System.out.print("Enter number of years:");
Integer numberOfyears=input.nextInt(); //计算未来的投资额
double futureInvestmentValue=investmentAmount*Math.pow(1+annualInvestmentRate/12, numberOfyears*12);
//计算年利率
//double annualInterestRate=monthlyInvestmentRate*12;
//double futureInvestmentValue=investmentAmount*(Math.pow(1+annualInterestRate,numberOfyears)); //输出结果
System.out.printf("Accumulated value is :  %.2f",futureInvestmentValue);
}
}
题目让输入的应该是年利率吧。

Answer 2

monthlyInterestRate 是 月利率的意思

Answer 3

如果是年利率的话就不用 numberOfyears*12