/**
* Calculates the numeric value of an expression.
*
* @param expression the expression to calculate
*
* @return the numeric value of the expression
*
* @throws Exception if the expression contained an error
*/
public int Calculate(string expression)
{
ArithmeticParser parser;
Node node;
parser = new ArithmeticParser(new StringReader(expression), this);
parser.Prepare();
node = parser.Parse();
return((int)node.Values[0]);
}
/**
* Creates a new parser.
*
* @param input the input to parse
*
* @return the parser created
*/
private Parser CreateParser(string input)
{
Parser parser = null;
try {
parser = new ArithmeticParser(new StringReader(input));
parser.Prepare();
} catch (ParserCreationException e) {
Fail(e.Message);
}
return(parser);
}
