for (int y = 1; y <= 7; y++)
{for (int x = 1; x <= 7; x++)
{if (x == y || x == 7-y+1)
{Console.Write("0");}
else
{Console.Write("."); } }
Console.WriteLine();}
namespace Test
{
class Program
{
static void Main(string[] args)
{
double x, y;
x = y = 2;//从右向左赋值，x、y的值都是2
x /= 0.5;
y += 2;
Console.WriteLine(x-y);
Console.ReadLine();
}
}
}
