do...while自動猜吧小遊戲---隨機數

public class Demo {
	public static void main(String[] args) {
				System.out.println("猜吧");
				int num=(int)(Math.random()*(100)+1);
				System.out.println("num="+num);
				int guess=(int)(Math.random()*(100)+1);
				int a=1;
				do{
						if(guess>num){
						System.out.println("guess="+guess);
						System.out.println("大了");
						a++;
						guess=(int)(Math.random()*(100)+1);
						}else{
						System.out.println("guess="+guess);
						System.out.println("小了");
						a++;
						guess=(int)(Math.random()*(100)+1);
						}
					}while (guess!=num);
				if(guess==num){
					System.out.print("恭喜你猜對啦！！！");
					System.out.print("guess="+guess);
					System.out.println("一共猜了"+a+"次"+"。你真棒！");
		}		
	}
}