动手动脑-2

package 课后练习;
import  java.util.Scanner;
import java.util.*;
public class 动手动脑_随机整数 {
public static void main(String[]args) {
    System.out.println("请输入你想产生的随机数的个数：");
    Scanner sc=new Scanner(System.in);
    int y=sc.nextInt();
    for(int i=0;i<y;i++) {
    int x=(int)(Math.random()*1000)+1;
    System.out.println(x);
    }
}
}

package 课后练习;

public class 动手动脑_观察代码 {
    public static void main(String[] args) {
        System.out.println("The square of integer 7 is " + square(7));
        System.out.println("\nThe square of double 7.5 is " + square(7.5));
    }

    public static int square(int x) {
        return x * x;
    }

    public static double square(double y) {
        return y * y;
    }
}