import java.util.Scanner;
public class PswVerify {
	public static void main (String[ ]args) { 	
    	Scanner input = new Scanner(System.in);
    	String username="zhangsan";
    	String password="000000";
    	for(int i=3;i>=1;i--){
    		System.out.println("請輸入用戶名:\n");
    		String huiyuanhao = input.next();
    		System.out.println("請輸入密碼:\n");
    		String mima = input.next();
    		if((huiyuanhao.equals(username)&&mima.equals(password))){
    			System.out.println("歡迎進入我行我素購物管理系統(tǒng)\n"); 
    			break;
    		}
    		else if(i>1){   			
    			System.out.println("用戶名與密碼不匹配！\n你還有"+(i-1)+"次機會，請重新輸入"); 
    		}
    		else{
    			System.out.println("用戶名或密碼錯誤"); 
    		}
    	}  	
    	System.out.println("程序結(jié)束"); 
     }
 	
}