public override float Eval()
{
if (right.Eval() == 0.0f)
{
ErrorExeption.customExeption("Error: Attempt to divide by 0");
throw new ArgumentException("Attempt to divide by 0");
}
return((right.Eval() != 0.0f) ? (left.Eval() / right.Eval()):float.MaxValue);
}
//Парсинг числа
private Operation parseNumber()
{
Operation result = null;
float val = 0.0f;
int start = position;
while (position < sourceStr.Length && (char.IsDigit(sourceStr [position]) || sourceStr [position] == '.' || sourceStr [position] == 'e'))
{
++position;
}
try{
val = float.Parse(sourceStr.Substring(start, position - start));
} catch {
ErrorExeption.customExeption("Can't parse '" + sourceStr.Substring(start));
throw new ArgumentException("Can't parse '" + sourceStr.Substring(start));
}
result = new Number(val);
return(result);
}