如何将输入变量从文件1连接到文件2

Question

我试图使一个简单的计算器，但与2个文件。第一个文件用于普通代码，第二个文件用于开关情况。我想做的是使用来自num1 num2的输入来switch.java我的问题是num1 num2不能在switch.java中解析为变量

第1周.Java

import java.util.Scanner;
public class week1
{
    public static void main(String[] args) {
    
        int num1;
        int num2;
        Scanner input = new Scanner(System.in);
        
        System.out.print("Input a number:");
        num1 = input.nextInt();
        
        System.out.print("Input a Math :");
        char operator1 = input.next().charAt(0);
        
        System.out.print("Input a number:");
        num2 = input.nextInt();

        int operator2 = 0;
        
        Switch swish = new Switch();
        swish.switchcase();
    }
}

switch.java

import java.util.Scanner;
public class Switch
{

    void switchcase()
    {
        switch(operator1){
            case '+':
                operator2 = num1 + num2;
                System.out.println("Addition: " + (week1.num1) + " " + operator1 + " " + num2 + " = " + operator2 );
                break;

            case '-':
                operator2 = num1 - num2;
                System.out.println("Subtraction: " + num1 + " " + operator1 + " " + num2 + " = " + operator2 );
                break;

            case '*':
                operator2 = num1 * num2;
                System.out.println("Multiplication: " + num1 + " " + operator1 + " " + num2 + " = " + operator2 );
                break;

            case '/':
                operator2 = num1 / num2;
                System.out.println("Division: " + num1 + " " + operator1 + " " + num2 + " = " + operator2 );
                break;
        }
    }
}

Answer 1

必须将参数传递给switchcase方法，然后返回结果。

课程第一周：

import java.util.Scanner;
public class Week1
{
    public static void main(String[] args) {
    
        int num1;
        int num2;
        Scanner input = new Scanner(System.in);
        
        System.out.print("Input a number:");
        num1 = input.nextInt();
        
        System.out.print("Input a Math :");
        char operator1 = input.next().charAt(0);
        
        System.out.print("Input a number:");
        num2 = input.nextInt();

        int result = Switch.switchcase(num1, operator1, num2);
        System.out.println(num1 + " " + operator1 + " " + num2 + " = " + result);
    }
}

类切换：

public class Switch {

    public static int switchcase(int num1, char operator1, int num2) {
        switch(operator1){
            case '+':
                return num1 + num2;    
            case '-':
                return num1 - num2;
            case '*':
                return num1 * num2;
            case '/':
                return num1 / num2;
        }
    }
}