package com.wang.mothod;
import java.util.Scanner;
public class Demo01 {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("请输入第一个数字:");
double num1=scanner.nextDouble();
System.out.print("请输入运算符:");
String operator=scanner.next();
System.out.print("请输入第二个数字:");
double num2=scanner.nextDouble();
switch (operator){
case "+":
System.out.println(num1+"+"+num2+"="+method1(num1,num2));
break;
case "-":
System.out.println(num1+"-"+num2+"="+method2(num1,num2));
break;
case "*":
System.out.println(num1+"*"+num2+"="+method3(num1,num2));
break;
case "/":
if(num2==0){
System.out.println("ERROR");
}else {
System.out.println(num1 + "/" + num2 + "=" + method4(num1, num2));
}
break;
default:
System.out.println("输入错误");
}
scanner.close();
}
//新建4种方法
public static double method1(double x,double y){
return x+y;
}
public static double method2(double x,double y){
return x-y;
}
public static double method3(double x,double y){
return x*y;
}
public static double method4(double x,double y){
return x/y;
}
}
标签:21,num2,num1,double,System,简易,计算器,public,out
From: https://www.cnblogs.com/PedroPascal/p/17095087.html