Java 猜数字游戏

import java.util.Scanner;
public class caishuziyx {
  public static void main(String[] args) {
    System.out.println("---------猜数字游戏----------");
    caishuziyx n=new caishuziyx();
    n.show();
  }
  int jiag;
  int n;
  int u;
  Scanner input = new Scanner(System.in);
  public void show() {
    int shuij1 = (int) (Math.random() * (100)) ; 
    for (int i = 0; i < 4; i++) {
      System.out.print("请输入要猜的数字:");
      jiag = input.nextInt();
      if (jiag != shuij1) {
        n += 1;
        u += 1;
      } else {
        System.out.println("猜对了");
        break;
      }
      if (jiag > shuij1 && u < 4) {
        System.out.println("再小点\n\n再猜一次吧");
      } else if (jiag < shuij1 && u < 4) {
        System.out.println("再大点\n\n再猜一次吧");
      }
      if (n == 4) {
        System.out.println("\n4次内没有猜对，下次努力吧！");
      }
    }
  }
}