to goodstuday(路漫漫),你的代码不正确,修改如下:
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using System;
class test5
{
public static void Main()
{
while(true)
{
Console.Write("请输入一个整数:");
int n=int.Parse(Console.ReadLine());
if (n<0) break;
for (int i=1;i<=n;i++) Console.WriteLine(i);
}
}
}
static void Main(string[] args)
{
string sinput;
Int16 num = 0;
Console.WriteLine("please input a number or press \"X\" to exit the program.");
while(true)
{
sinput = Console.ReadLine();
if(sinput == "X" | sinput == "x")
break;