/// <summary>
/// demo
/// </summary>
/// <param name="args"></param>
static void Main(string[] args)
{
Jar jar = new Jar();
Console.WriteLine("Initially:\n");
jar.PrintJar();
var coin001 = new Coin001();
coin001.AddToJar(jar);
Console.WriteLine("\r\n\r\n\r\n\r\nAfter added 1 cent to the jar:\n");
jar.PrintJar();
}
/// <summary> /// Abstract method to add the coin to the jar. /// Due to different coins have different specification and value, we need to implement it in derived sub-class /// </summary> /// <param name="jar"></param> /// <returns>true: succeeded adding the coin to the jar</returns> public abstract bool AddToJar(Jar jar);
