java - 程序运行没有错误，但输出不正确

Question

嗨，我完全是一个初学者，正在尝试一个简单的输入/输出程序进行练习，整个程序在我的 Eclipse 编译器中运行，但结果类似于

输入维护费用:87
输入学费:67
输入水电费账单:98
输入杂货费用:88
总费用:88(这是它给出我输入的最后一个值的问题)

import java.util.Scanner;

public class budgetSystem {
    Scanner userInput = new Scanner(System.in);
    private static Scanner userInput2;
    public static void main(String[] args){

         int utilityBills = 0;
         int maintainceExp = 0;
         int schoolExp = 0;
         int groceryExp = 0;
         int totalExp = 0;
         userInput2 = new Scanner(System.in);

             System.out.println("Enter Maintaince Expance:");
             utilityBills = userInput2.nextInt();

             System.out.println("Enter School Fees:");
             utilityBills = userInput2.nextInt();

             System.out.println("Enter Utility Bills:");
             utilityBills = userInput2.nextInt();

             System.out.println("Enter Grocery Expance:");
             utilityBills = userInput2.nextInt();

            totalExp= utilityBills + maintainceExp + schoolExp + groceryExp;

             System.out.println("Total Expance: " + totalExp);



    }

} // END OF BUDGET SYSTEM

Answer 1

对于重新分配 utilityBills 变量的每一步，请更改代码:

System.out.println("Enter Maintaince Expance:");
utilityBills = userInput2.nextInt();

至

System.out.println("Enter Maintaince Expance:");
utilityBills += userInput2.nextInt();

在您进行的每个输入中，这都会打印正确的输出。