JavaSE:猜数字小游戏的实现源码

实现要求：

根据要求，代码实现如下：

import java.util.Random;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Random rand = new Random();
		Scanner scan = new Scanner(System.in);
		System.out.println("请输入猜数范围：下限和上限");
        System.out.println("猜数范围下限：");
		int down = scan.nextInt();
        System.out.println("猜数范围上限：");
		int up = scan.nextInt();
		int key = rand.nextInt(up-down+1)+down;
		int num = 1;//猜数字的次数
		//System.out.println(key);
		while(true) {
			System.out.print("请输入您猜的数字->");
			int guess = scan.nextInt();   //要猜的数字
			if(guess == key) {
				System.out.println("第"+num+"次猜数为->"+guess+",恭喜你猜中！");
				break;
			}
			else if(guess > key) {
				System.out.println("第"+num+"次猜数"+guess+"大了！");
			}
			else {
				System.out.println("第"+num+"次猜数"+guess+"小了！");
			}
			num++;
		}
	}

}