static void Main(string[] args)
{
complex s1, s2;
string strinput = Console.ReadLine();
string [] str_c = new string[2];
str_c = strinput.Split(' ');
s1.r = double.Parse(str_c[0]);
s1.i = double.Parse(str_c[1]);
strinput = Console.ReadLine();
str_c = strinput.Split(' ');
s2.r = double.Parse(str_c[0]);
s2.i = double.Parse(str_c[1]);
complex s3 = s1.AddComplex(s2);
s1.Show();
Console.Write("+");
s2.Show();
Console.Write("=");
s3.Show();
s3 = s1.SubComplex(s2);
s1.Show();
Console.Write('-');
s2.Show();
Console.Write('=');
s3.Show();
s3 = s1.MulComplex(s2);
s1.Show();
Console.Write("*");
s2.Show();
Console.Write("=");
s3.Show();
s3 = s1.DivComplex(s2);
s1.Show();
Console.Write("/");
s2.Show();
Console.Write("=");
s3.Show();
}
