JavaSE 高级 第03节 Math类与猜数字游戏

package com.java1995;

public class TestMath {

    public static void main(String[] args) {
        double d = Math.ceil(2.98);
        System.out.println(d);

        d = Math.floor(2.98);
        System.out.println(d);

        System.out.println(Math.max(6.5, 4.6));

        for (int i = 0; i < 10; i++) {
            System.out.println(Math.random());
        }
    }
}

package com.java1995;

import java.util.Scanner;

public class GuessNumber {

    public static void main(String[] args) {
        int num = (int) (Math.random() * 100) + 1;// [1,100]
        System.out.println("请输入1-100之间的整数");
        Scanner sc = new Scanner(System.in);
        while (true) {
            int input = sc.nextInt();
            if (input > num) {
                System.out.println("太大了");
            } else if (input < num) {
                System.out.println("太小了");
            } else {
                System.out.println("恭喜你，猜对了！");
                break;
            }
        }
        // sc.close();
    }
}