namespace DoCasting;

using System;

class Program

{

    static void Main(string[] args)

    {

​

        int sum = 17;

        int count = 5;

        int intAverage = sum / count;

        Console.WriteLine("interger average : " + intAverage);

        double doubleAverage = 1.0d * sum / count;

        Console.WriteLine("double average   : " + doubleAverage );

​

    }

}

​