我正在嘗試編制一個攤銷計算器,用戶可以在其中輸入餘額值,以小數形式表示他們的利率值,以及每月付款的價值。有了這些信息,我想輸出美元,本金和新餘額的利息金額。這裏是我的代碼:Java編譯器告訴我我沒有啓動變量「interest」或「pmt」
import java.util.Scanner;
public class Amortization{
public static void main(String []args){
Scanner pmt, interest, balance = new Scanner(System.in);
System.out.println("What is your balance?");
double b = balance.nextDouble();
System.out.println("What is your interest rate in decimal?");
double i = interest.nextDouble();
System.out.println("What is your monthly payment?");
double p = pmt.nextDouble();
double pv = p-(b*i);
System.out.println("Your interest amount is " + (b*i));
System.out.println("Your principal amount is " + pv);
System.out.println("Your new balance is " + (b-pv));
}
}
如果你想從'System.in'中讀取所有的輸入信息,你爲什麼要首先定義3個掃描儀? – azurefrog
你可以定義一個掃描儀,然後從它讀取三次到你想要的變量。 –