Console-算法[for,while,dowhile]-读取7个数（1—50）的整数值，每读取一个值，程序打印出该值个数的＊

using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int i, a, n=1;
            while (n <= 7)
            {
                do
                {
                    a = Convert.ToInt32(Console.ReadLine());
                }
                while (a < 1 || a > 50);

                for (i = 1; i <= a; i++)
                {
                    Console.Write("*");
                }
                Console.WriteLine();
                n++;
            }
        }
    }
}

1
*
100
3
***
9
*********
50
**************************************************
3
***
3
***
4
****
请按任意键继续. . .