程序编译通过，为什么运行不了？？

import java.util.Scanner;
public class A{
    public static void main(String[] args){
        Scanner s = new Scanner(System.in);
        int person = s.nextInt();
        int computer = (int)(Math.random()*3)+1;
        
        System.out.println("---出拳游戏---");
        System.out.println("请出拳：（1：剪刀 2：石头 3：布）");
        String mark  = "我";
        String mark2 = "我";
        
        switch (person){
            
             case 1:
             mark = "剪刀";
             break;
            
             case 2:
             mark = "石头";
             break;
            
             case 3:
             mark = "布";
           break;}
            
         
     switch (computer){
             case 1:
             mark2 = "剪刀";
             break;
            
             case 2:
             mark2 = "石头";
             break;
            
             case 3:
             mark2 = "布";
           break;}
            
            
     if (person==computer){
         
         System.out.println("你出的是"+mark+"电脑出的是"+mark2+"pingju");
         }
         else if(person==1&&computer==2||person==2&&computer==3||person==3&&computer==1){
            
             System.out.println("你出的是"+mark+"电脑出的是"+mark2+"你输了");
            
            
             }
             else {
                 
                 System.out.println("你出的是"+mark+"电脑出的是"+mark2+"你赢了");
                 }
        
        
        
        }




}