BN089-BS开发框架MVC4版/source20131023/Zephyr.Net/Zephyr.Utils/Document/Excel/NPOI/SS/Formula/Functions/Combin.cs

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/*
* Licensed to the Apache Software Foundation (ASF) Under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for Additional information regarding copyright ownership.
* The ASF licenses this file to You Under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License.  You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed Under the License is distributed on an "AS Is" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations Under the License.
*/
/*
 * Created on May 15, 2005
 *
 */
namespace Zephyr.Utils.NPOI.SS.Formula.Functions
{
    using Zephyr.Utils.NPOI.SS.Formula.Eval;

    /**
     * @author Amol S. Deshmukh < amolweb at ya hoo dot com >
     *
     */
    public class Combin : TwoArg
    {

		public override double Evaluate(double d0, double d1)
        {
			if (d0 > int.MaxValue || d1 > int.MaxValue) {
				throw new EvaluationException(ErrorEval.NUM_ERROR);
			}
			return  MathX.nChooseK((int) d0, (int) d1);
		}

    }
}