static void Main(string[] args)
{
//create a new instance of userage to use the methods for getting the year born
UserAge yearBorn = new UserAge();
yearBorn.keepAsking = true;
while (yearBorn.keepAsking == true)
{
//3.Exceptions must be handled using "try .. catch".
try
{
//call the method to get the year born from teh UserAge class
yearBorn.GetYearBorn();
}
//4.Display appropriate error messages if user enters zero or negative numbers.
//Catch an exception when a user enters an invalid value less than 1 or greater than 12 for months
catch (ArgumentOutOfRangeException)
{
Console.WriteLine("You entered a value less than 0 or greater than 12 for month of birhday!\n");
LogOutputToFile(DateTime.Now + " : User entry for age was invalid (less than 0 or greater than 12 for month born).");
}
//catch an exception when a user enters something other than a whole number(i.e. decimal or characters other than numbers)
catch (FormatException)
{
Console.WriteLine("You entered an invalid value that was not a number.\n");
LogOutputToFile(DateTime.Now + " : User entry was not a valid integer value.");
}
catch (ArgumentNullException)
{
Console.WriteLine("You didn't enter a value.\n");
LogOutputToFile(DateTime.Now + "User didn't enter a value exception.");
}
//5.Display a general message if exception caused by anything else.
catch (Exception)
{
Console.WriteLine("An error occured! Please contact your system administrator.\n");
LogOutputToFile(DateTime.Now + " : Generic exception occured.");
}
}
Console.ReadLine();
}
public void GetYearBorn()
{
bool validAge = false;
int userAge = 0;
bool validMonth = false;
int userMonth = 0;
//Get user input for the users age
while (!validAge)
{
var logOutput = new UserAge();
//1. Ask the user for his age.
Console.Write("Please enter your age: ");
validAge = int.TryParse(Console.ReadLine(), out userAge);
//The user didn't enter a numeric value.
if (!validAge)
{
Console.WriteLine("You didn't enter a numeric value!");
Console.WriteLine("Please enter a whole number for your age...no decimal values!");
throw new FormatException("User entry for age was invalid! Not a numeric value.");
}
//The user entered an age less than or equal to 0.
else if (userAge <= 0)
{
Console.WriteLine("You entered a value less than or equal to 0");
Console.WriteLine("Please enter a whole number greater than 0 for your age...no decimal values: ");
throw new ArgumentOutOfRangeException("User entry for age was less than or equal to 0!");
}
validAge = true;
//Getting the month a user was born and checking for a valid numeric entry for month born
while (validAge == true && !validMonth)
{
Console.Write("\nPlease enter the number of the month you were born: ");
validMonth = int.TryParse(Console.ReadLine(), out userMonth);
//The user didn't enter a numeric value.
if (!validMonth)
{
Console.WriteLine("Please enter a numeric value between 1 and 12 that is a whole number!");
throw new FormatException("User entry for month was invalid. Not a value between 1 and 12.");
}
//check to see if the user entered a value between 1 and 12
else if (userMonth < 1 || userMonth > 12)
{
Console.WriteLine("You enter an invalid number for the month you were born!");
Console.WriteLine("Please enter a valid number for the month you were born between 1 and 12.");
validMonth = false;
throw new ArgumentOutOfRangeException("User entry for month was less than 1 or greater than 12.");
}
validMonth = true;
}
}
//if the user is over 100 years, tell them they are OLD!
if (userAge > 100)
{
Console.WriteLine("\nMan, you are OLD! You were born a REALLY long time ago!");
}
//writing out the current year to console so I can see the value here
Console.WriteLine("\nThe current year is {0}", DateTime.Now.Year);
//create a variable for year born based solely on the current year minus their age
int yearBorn = DateTime.Now.Year - userAge;
keepAsking = false;
//If the month they were born is greater than the current year's month we need to
//subtract a year from the yearBorn variable to account for they since the they are
//ALMOST a year older (i.e. I'm 49 born in april...the year is now 2019 in january
//simply subracting my age won't give the correct year born because it didn't account
//for the month i was born
if (userMonth > DateTime.Now.Month)
{
yearBorn -= 1;
}
//2.Display the year user born.
Console.WriteLine("You were born in: " + yearBorn);
//all valid entries have been entered, so we can quit now...setting to false
keepAsking = false;
}