用C#作圖，請用雙重for循環

Question

   *
  ***
 *****
*******                              讓它在控制台打印出來！

Answer 1

            for (int n = 1; n < 5; n++)
            {
                for (int m = 0;m<2*n-1 ;m++ )
                {
                    Console.Write("*");
                }
                Console.WriteLine();
            }
            Console.ReadLine();

Answer 2

int count = 7;
            int rowcount = count / 2 + 1;
            for (int i = 0; i < rowcount; i++)
            {
                for (int j = 0; j < count; j++)
                {
                    if (j < count / 2 - i||j>count/2+i)
                    {
                        Console.Write(" ");
                        continue;
                    }
                    Console.Write("*");
                    
                }
                Console.WriteLine();
            }
            Console.ReadLine();
count 为 奇数 ， 表示 三角形底的 星号个数

Answer 3

PS 再不结贴号要被封杀了你的这个问题去百度 c#基础版能找到