简单计算器

import java.util.*;public class Example6 {public static void main(String []args){Scanner in = new Scanner(System.in);System.out.print("输入你要的计算的公式：");int t = in.nextInt();for(int i=0;i<t;i++){System.out.print("输入:");String str=in.next();if(str.contains("+")){String s[] = str.split("[+]");int a=Integer.parseInt(s[0]);int b=Integer.parseInt(s[1]);int sum=a+b;System.out.println("输出 ："+sum);}else if(str.contains("-")){String s[]=str.split("[-]");int a=Integer.parseInt(s[0]);int b=Integer.parseInt(s[1]);int sum=a-b;System.out.println("输出："+sum);}else if(str.contains("*")){String s[]=str.split("[*]");int a=Integer.parseInt(s[0]);int b=Integer.parseInt(s[0]);int sum=a*b;System.out.println("输出："+sum);}else{String s[]=str.split("[/]");int a=Integer.parseInt(s[0]);int b=Integer.parseInt(s[0]);int sum=a/b;System.out.println("输出："+sum);}}}｝