public bool TryLaodFromString(string st)
{
bool res = true;
Clear();
//Root = null;
int pos = 0;
Root = OneNode.NewNode(ref st, ref pos);
//MessageBox.Show("In load tree "+ Root.ToString());
while (pos < st.Length && st[pos] == ' ')
{
++pos;
}
if (pos != st.Length || Root == null)
{
//MessageBox.Show("Can't");
Clear();
res = false;
}
return(res);
}
public override bool LoadNodeFromString(ref string st, ref int pos)
{
bool res = true;
if (pos >= st.Length)
{
res = false;
}
else
if (st[pos] != '(')
{
res = false;
}
else
{
++pos;
while (pos < st.Length && st[pos] == ' ')
{
++pos;
}
left = OneNode.NewNode(ref st, ref pos);
if (left == null)
{
res = false;
}
else
{
while (pos < st.Length && st[pos] == ' ')
{
++pos;
}
int p = Array.IndexOf(Sings, st[pos]);
if (pos == st.Length || p == -1 || p == 4)
{
res = false;
}
else
{
sign = (Sign)p;
// MessageBox.Show("Sign in reading = " + st[pos] + " p = " + p+" si = "+sign);
++pos;
right = OneNode.NewNode(ref st, ref pos);
if (right == null)
{
res = false;
}
else
{
while (pos < st.Length && st[pos] == ' ')
{
++pos;
}
if (pos == st.Length || st[pos] != ')')
{
res = false;
}
else
{
++pos;
}
// MessageBox.Show("res = " + res);
}
}
}
}
return(res);
}