/// <summary>
/// Adds a new Fuzzy Set (Checks for naming
/// conflicts first)
/// </summary>
/// <param name="_fs"></param>
/// <returns></returns>
public int Add(FuzzySet _fs)
{
// adds a fuzzy set (checks name first)
// -1 = fails
FuzzySet k = Find(_fs.GetName());
if (k != null)
return -1;
int i = FindEmpty();
if (i==-1)
return -1;
f[i] = _fs;
if (i >= numFuzzySets) numFuzzySets=i+1;
return i;
}