第9次作业

代码int mun = 0;
Console.WriteLine("请输入一个数字");
string str_mun = Console.ReadLine();
try
{
mun = Convert.ToInt32(str_mun);
}
catch
{

            Console.WriteLine("你输入有错误");
        }
        for (int i = 0; i <= mun; i++)
        {
            Console.WriteLine("{0}+{1}={2}",i,mun-i,mun);
        }
        Console.ReadKey();