static void Main(string[] args)
{
int intInput = 0;
while (true)
{
Console.Write("请输入一个大于0的正整数：");
string strInput = Console.ReadLine();
if (int.TryParse(strInput,out intInput) && intInput > 0)
break;
}
int result = 0;
for (int i = 1; i