using System;
using System.Collections.Generic;
using System.Text;
namespace Console2
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("请输入要显示的行数:");
string lineCount = Console.ReadLine();
int l;
while (!int.TryParse(lineCount, out l))
{
Console.WriteLine("请输入要显示的行数:");
lineCount = Console.ReadLine();
}
for (int i = 0; i < l; i++)
{
for (int j = 0; j <= i; j++)
{
Console.Write('*');
}
Console.WriteLine();
}
Console.ReadKey(true);
}
}
}
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