简易计算器
package com.lime.method;
import java.util.Scanner;
public class Demo06 {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("输入:");
if (scanner.hasNextInt()){
int i=scanner.nextInt();
String a = scanner.next();
int j=scanner.nextInt();
switch (a){
case"+":
int add=add(i,j);
System.out.println(add);
break;
case"-":
int jian=jian(i,j);
System.out.println(jian);
break;
case"*":
int cheng=cheng(i,j);
System.out.println(cheng);
break;
case"/":
int chu=chu(i,j);
System.out.println(chu);
break;
}
scanner.close();
}
}
public static int add(int a,int b){
return a+b;
}
public static int jian(int a,int b){
return a-b;
}
public static int cheng(int a,int b){
return a*b;
}
public static int chu(int a,int b){
if(b==0){
System.out.println("错误");
}
return a/b;
}
}