//Problem 12 public static void StartTest() { var gsm = new Gsm("Samsung", "S300"); gsm.AddCall("6/15/2009 1:45 PM", 50, "088889880"); gsm.AddCall("7/16/2010 2:45 PM", 60, "088889861"); gsm.AddCall("8/17/2011 3:45 PM", 70, "088889862"); gsm.AddCall("9/18/2012 4:45 PM", 80, "088889863"); gsm.AddCall("10/19/2014 6:45 PM", 1500, "088889865"); gsm.AddCall("10/19/2013 5:45 PM", 100, "088889864"); var longestCall = gsm.CallHistory[0]; Console.WriteLine("Starting call history test:\n"); foreach (var call in gsm.CallHistory) { Console.WriteLine("Call date: " + call.DateTime); Console.WriteLine("Call duration in seconds: " + call.DurationInSeconds); Console.WriteLine("Call to: " + call.DialedNumber + "\n"); if (longestCall.DurationInSeconds < call.DurationInSeconds) { longestCall = call; } } Console.WriteLine("Total price of calls before removing longest: {0:F2}\n", +gsm.GetTotalPriceOfCalls(PricePerMin)); Console.WriteLine("Deleting longest call. Starting test:\n"); gsm.DeleteCall(longestCall); foreach (var call in gsm.CallHistory) { Console.WriteLine("Call date: " + call.DateTime); Console.WriteLine("Call duration in seconds: " + call.DurationInSeconds); Console.WriteLine("Call to: " + call.DialedNumber + "\n"); } Console.WriteLine("Total price of calls after removing longest: {0:F2}\n", +gsm.GetTotalPriceOfCalls(PricePerMin)); }