java - 我无法弄清楚这 3 个相关错误

Question

我有 3 个错误，我无法用我理所当然的低水平技能修复这些错误。

我只是想输入第一年的销售数据，这没问题，但我想把总销售额计算在输出值以下并收到错误。

C:\Users\Steven\Documents\assignment2.java:21: error: '.class' expected
System.out.println(int counter + "\t\t\t\t" + sales[counter]);

C:\Users\Steven\Documents\assignment2.java:21: error: not a statement
System.out.println(int counter + "\t\t\t\t" + sales[counter]);

C:\Users\Steven\Documents\assignment2.java:21: error: ';' expected
System.out.println(int counter + "\t\t\t\t" + sales[counter]);

代码:

import java.util.Scanner;

public class assignment2
{

    public static void main(String [] args)
    {

        Scanner keyboard = new Scanner(System.in);
        System.out.println("Welcome\n");

        System.out.println("Sales Month\t\tSales made");
        int sales[]={60,54,62,67,54,67,51,50,62,55,49,70};
        int sum=0;

        for(int counter=0;counter < sales.length;counter++)
        {
            sum+=sales [counter];

        }
        System.out.println("The sum of the sales is " +sum);
        System.out.println(int counter + "\t\t\t\t" + sales[counter]);

    }

Answer 1

我想你需要这样的东西:

import java.util.Scanner;
  public class assignment2 {

    public static void main(String[] args) {
        Scanner keyboard = new Scanner(System.in);
        System.out.println("Welcome\n");
        System.out.println("Sales Month\t\tSales made");
        int sales[] = { 60, 54, 62, 67, 54, 67, 51, 50, 62, 55, 49, 70 };
        int sum = 0;
        for (int counter = 0; counter < sales.length; counter++) {
            sum += sales[counter];
            System.out.println(counter + "\t\t\t\t" + sales[counter]);
        }
        System.out.println("The sum of the sales is " + sum);
    }
}