七星彩随机选号

package 课上程序;

/**
 * 
 * 七星彩选号
 * @author 王启文
 * 
 */

import java.util.Scanner;

public class qixincaixuanhao {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("请输入您需要的注数：\n");
        if (sc.hasNextInt()) {
            int a = sc.nextInt();
            if (a > 0) {
                for (int j = 1; j <= a; ++j) {
                    System.out.printf("第%d注为：", j);
                    for (int i = 1; i <= 7; ++i) {
                        int b = (int) (Math.random() * 10);
                        System.out.print("  " + b);
                    }
                    System.out.println();
                }
            }
        }
        sc.close();
    }
}