Question

This is to be in C# and this project is being made in Microsoft Visual Studio

Create a Date class that does the following:
o A default constructor
o A constructor with a string argument
o An integer member variable that represents the date in the following format:
 YYYYMMDD
 i.e. 20070212 means February 12, 2007
o A string member variable that represents the date in the following format:
 YYYY-MM-DD
o An integer member variable that represents a year
o An integer member variable that represents a month
o An integer member variable that represents a day of the month
o A method that converts a YYYY-MM-DD into YYYYMMDD
o A method that converts a YYYYMMDD into YYYY-MM-DD
o A method that extracts only the year from YYYYMMDD
o A method that extracts only the month from YYYYMMDD
o A method that extracts only the day from YYYYMMDD

Answer 1

Program:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DateDemo
{
class Date
{
public string dateStr;
public int dateInt;
public int year,month,day;

public Date()
{
dateStr = "YYYY-MM-DD";
}
public Date(string date)
{
dateStr = date;
}

public void ConvertStrDateToIntDate()
{
dateStr = dateStr.Replace("-", ""); //removing -
dateInt = Convert.ToInt32(dateStr);
Console.WriteLine("Converted YYYY-MM-DD into YYYYMMDD: " + dateStr);
ConvertIntDateToStrDate();//calling ConvertIntDateToStrDate() function
}

public void ConvertIntDateToStrDate()
{
string newDateStr = Convert.ToString(dateInt);
newDateStr = newDateStr.Insert(4, "-"); //inserting -
newDateStr = newDateStr.Insert(7, "-");
Console.WriteLine("Converted YYYYMMDD into YYYY-MM-DD: " + newDateStr);
}

public void extractYear()
{
year = Convert.ToInt32(dateStr.Substring(0, 4));
Console.WriteLine("Extracted year: "+year);
}

public void extractMonth()
{
month = Convert.ToInt32(dateStr .Substring(4,2));
Console.WriteLine("Extracted month: " + month);
}

public void extractDay()
{
day = Convert.ToInt32(dateStr.Substring(6, 2));
Console.WriteLine("Extracted month: " +day); }
}
class Program
{
static void Main(string[] args)
{
string dateS1;
Console.Write("Enter date string: ");
dateS1 = Console.ReadLine();
Date d1 = new Date(dateS1);
d1.ConvertStrDateToIntDate();
d1.extractYear();
d1.extractMonth();
d1.extractDay();
Console.ReadKey();
}
}
}

Output: