static void Main(string[] args)
{
StringDS s = new StringDS("I am isscuss");
StringDS i = new StringDS("nice");
StringDS r = new StringDS("student");
StringDS a = new StringDS("iss");
Console.WriteLine(s.GetLength());
Console.WriteLine(i.GetLength());
Console.WriteLine(r.GetLength());
StringDS s2 = s.SubString(8, 4);
Console.WriteLine(s2.ToString());
StringDS s3 = i.SubString(2, 1);
Console.WriteLine(s3.ToString());
Console.WriteLine(s.IndexOf(a));
Console.ReadKey();
}
public void exercises()
{
StringDS s = new StringDS("i am cccc");
StringDS c = new StringDS("am cc");
StringDS r = new StringDS(" bbb");
int di = 0;
while (true)
{
di++;
int i = s.IndexOf(c);
Console.WriteLine(s[i]);
s[i] = r[2];
Console.WriteLine(s[i]);
if (di == s.GetLength())
{
break;
}
}
}