public static int Reduce(StringBuilder p)
{
List<int> tempOpen = new List<int>();
int index;
int numberSignais = 0;
bool lostClosed = false;
for (int i = 0; i < p.Length; i++)
{
if (!Char.IsNumber(p[i]))
{
//First case the equation is inside!
if (p[i] == ')')
{
closed++;
if (tempOpen.Count > 0)
{
index = tempOpen[tempOpen.Count - 1];
StringBuilder pointer = new StringBuilder(p.ToString(index + 1, i - index - 1));
String result = SimpleSolve(pointer).ToString();
i = p.ReplaceRegion(index, i, result) - 1;
tempOpen.RemoveAt(tempOpen.Count - 1);
}
else
{
lostClosed = true;
}
}
else
{
if (p[i] == '(')
{
open++;
tempOpen.Add(i);
}
else
{
numberSignais++;
}
}
}
}
if (tempOpen.Count == 0 && lostClosed == false)
{
if (p[0] != '*' && p[0] != '/' && Char.IsNumber(p[p.Length - 1]))
{
int result = SimpleSolve(p);
p.Clear();
p.Append(result);
}
}
return numberSignais;
}
public void String_Test_Value()
{
StringBuilder sb = new StringBuilder("abcdefghij");
int index = sb.ReplaceRegion(2, 4, "teste");
Assert.IsTrue(sb.ToString().Equals("abtestefghij"));
}
public void String_Test_Next_Char()
{
StringBuilder sb = new StringBuilder("abcdefghij");
int index = sb.ReplaceRegion(2, 4, "teste");
Assert.IsTrue(sb[index].Equals('f'));
}