C#

Question

用for循环  怎么完成
     *
    ***
   *****
  *******

Answer 1

//按扭的代码如下：
        private void button1_Click(object sender, EventArgs e)
        {
            string BSF,tbtext;
            BSF = "*";
            tbtext = textBox1.Text.Trim();
            richTextBox1.Clear();
            //C# 字符型转换成数值型
            for (int i = 1; i <= (Int32.Parse(tbtext)); i++)
            {
              for (int j = 1; j <= i; j++)
              {
                  richTextBox1.Text += BSF;
                  
                  if (j == i)
                  {
                      richTextBox1.Text += "\r";
                  }
              }
            }
        }