private static Function createCosFunction()
{
Declaration declaration = new Declaration("cos(x)");
EvaluationNode node = new CosNode();
EvaluationTree tree = new EvaluationTree(node);
return(new Function(declaration, tree));
}
/// <summary>
/// 余弦関数の評価
/// </summary>
/// <param name="node">余弦関数ノード</param>
/// <returns>演算後の数値(Double)</returns>
public override object Visit(CosNode node)
{
return(Math.Cos((double)Visit(node.Value)));
}
public abstract T Visit(CosNode node);
