java实现简单的计算器功能
1 package com.su.jichu;
2
3 import com.sun.xml.internal.ws.api.model.wsdl.WSDLOutput;
4
5 import java.util.Scanner;
6
7 public class jsq {
8 public static void main(String[] args) {
9 Scanner scanner = new Scanner(System.in);
10 double a = scanner.nextInt();
11 char c = scanner.next().charAt(0); //将获取到的第一个char类型赋值给b
12 double b = scanner.nextInt();
13 System.out.println(a+""+""+c+""+b);
14 switch (c){
15 case '+' : jia(a,b); break;
16 case '-': jian(a,b); break;
17 case '*' : chen(a,b); break;
18 case '/' : chu(a,b); break;
19 default:
20 System.out.println("输入有误！！");
21 break;
22 }
23 }
24 public static void jia(double a,double b)
25 {
26 double sum =a + b;
27 System.out.println("sum="+sum);
28
29 }
30 public static void jian(double a,double b)
31 {
32 double sum=0;
33 if(a>b){
34 sum=a-b;
35 }else{
36 sum=-(b-a);
37 }
38 System.out.println("sum="+sum);
39
40 }
41 public static void chen(double a,double b)
42 {
43 double sum = a*b;
44 System.out.println("sum="+sum);
45
46 }
47 public static void chu(double a,double b)
48 {
49 double sum = a /b;
50 System.out.println("sum="+sum);
51
52 }
53 }
