java - 找不到符号错误，类型不兼容

Question

您好，我正在尝试编写一个程序，使用固定利率计算 future 的投资值(value)，但我的变量存在问题。任何帮助将不胜感激，提前谢谢!

  /**
  * NAME:
  * DATE: November 3, 2015
  * FILE: 
  * COMMENTS: This program caculates a future investment value using a fixed rate
  */
  import java.util.Scanner;

public class lab12
{
   public static void main(String[] args)
   {
   //declare variables
   double yearlyInterstRate;
   double monthlyInterestRate;
   double monthlyInvestmentAmount;
   double years;
   double months;

   //Create Scanner Object
   Scanner keyboard= new Scanner(System.in);

   //Get Investment Information
   System.out.print("Hello we will be caculating the future of your fixed monthly investment, I will need to collect some information from you.");
   System.out.print("What is your monthly investment amount?");
   monthlyInvestmentRate=keyboard.nextLine();
   System.out.print("How many years wil you be investing for?");
   years=keyboard.nextLine();
   System.out.print("What is your yearly interest rate?");
   yearlyInterestRate=keyboard.nextLine();
   //Caculate the future rate
   {
      months=years*12;
      monthlyInterestRate=yearlyInterestRate/12/100;
      futureValue= CaculateFuturevalue(monthlyInvestedAmount,monthlyInterestRate,months);
      System.out.print("Your future value is $"+futureValue);
    }
 } //Close Main
} //close lab12

Answer 1

您的变量拼写错误。

您已声明 yearlyInterstRate，但正在使用 yearlyInterestRate，因此您需要使用声明的变量。

您还需要使用monthlyInvestmentAmount而不是monthlyInterestRate。