static void Main(string[] args)
{
// Abstract Syntax Tree (AST) for 5*10
Exp e = new BinaryExp(new NumericConstant(5),
new NumericConstant(10),
OPERATOR.MUL);
//
// Evaluate the Expression
//
//
Console.WriteLine(e.Evaluate(null));
// AST for -(10 + (30 + 50 ) )
e = new UnaryExp(
new BinaryExp(new NumericConstant(10),
new BinaryExp(new NumericConstant(30),
new NumericConstant(50),
OPERATOR.PLUS),
OPERATOR.PLUS),
OPERATOR.MINUS);
//
// Evaluate the Expression
//
Console.WriteLine(e.Evaluate(null));
//
// Pause for a key stroke
//
Console.Read();
}
public override double Evaluate(RUNTIME_CONTEXT cont)
{
return(_ex1.Evaluate(cont));
}