static void built_in_str()
{
String_column clmn1 = new String_column();
int Size = 36;
for (int i = 0; i < Size; i++)
{
clmn1[i] = clmn1[i] + " " + i;
}
string s = clmn1 + " String column : ";
Console.WriteLine(s);
}
static void Str_column_matr()
{
String_matrix tbl1 = new String_matrix(false);
String_column tbl2 = new String_column();
// print out tables
Console.WriteLine("Code 1: ");
tbl1.Write_matrix();
Console.WriteLine("Using column. ");
// perform addition and print out results
String_matrix tbl3 = tbl1 + tbl2;
Console.WriteLine();
Console.WriteLine("Code 1 + column = ");
tbl3.Write_matrix();
}