Question

C++
1. Start with a UML diagram of the class definition for the following problem defining
a utility class named Month.
2. Write a class named Month. The class should have an integer field named
monthNumber that holds the number of the month (January is 1, February is 2,
etc.). Also provide the following functions:
• A default constructor that sets the monthNumber field to 1.
• A constructor that accepts the number of month as an argument and sets the
monthNumber field to the passed value. Set the monthNumber to 1 if the
passed argument’s value is not a value between 1 and 12.
• A constructor that accepts the name of month, such as “January” as an
argument and sets the monthNumber field to the correct corresponding value.
Make sure this is not case sensitive, so entering “January” will return the same
value as if “JaNUary” was entered. If an invalid month is entered, set the
monthNumber to 1.
• A setMonthNumber function that accepts an integer argument to assign to
the monthNumber field. Set the monthNumber to 1 if the passed argument’s
value is not a value between 1 and 12.
• A getMonthNumber function that returns the value in the monthNumber
field.
• A getMonthName function that returns the name of the month. For example,
if the monthNumber field is 1, then this function will return “January”. Note
that this function does not accept any parameters. It looks up the
monthNumber field to make its decision.
• A function named print that prints the month number and the month name.

• Write a main program that uses the class Month and test various operations
on the objects of the class Month. Perform a series of operations to test each
of the functions and the constructors. Make sure to prompt the user to enter a
value for monthNumber as you test your code. As part of your testing,
generate a set of random numbers for month number (between 1 and 12) and
display the month number along with the month name.

Answer 1

Month UML class diagram

Month monthNumber: int month: String +Month() +Month (monthNumber:int) +setMonthName ( +getMonthNumber ) int +Month (month:String) +ge tMonthlame () : String tpaint void (monthNumber:int): void

Java code:

//Month.java
import java.util.Random;
public class Month
{
   private int monthNumber;
   String month;

   /*Default constructor*/
   public Month()
   {
       monthNumber = 1;
   }
/*Constructor that takes monthNumber as input*/
   public Month(int monthNumber)
   {
       /*Calling setMonthNumber method*/
       setMonthNumber(monthNumber);
   }

   /*Method to set month number*/
   public void setMonthNumber(int monthNumber)
   {
       if (monthNumber >= 1 && monthNumber <= 12)
           this.monthNumber = monthNumber;
       else
           monthNumber = 1;
   }
   /*Returns the monthNumber*/
   public int getMonthNumber()
   {
       return monthNumber;
   }

   /*Set month number */
   public Month(String month)
   {
       this.month = month;
       if (this.month.equalsIgnoreCase("January"))
           this.monthNumber = 1;
       else if (this.month.equalsIgnoreCase("February"))
           this.monthNumber = 2;
       else if (this.month.equalsIgnoreCase("March"))
           this.monthNumber = 3;
       else if (this.month.equalsIgnoreCase("April"))
           this.monthNumber = 4;
       else if (this.month.equalsIgnoreCase("May"))
           this.monthNumber = 5;
       else if (this.month.equalsIgnoreCase("June"))
           this.monthNumber = 6;
       else if (this.month.equalsIgnoreCase("July"))
           this.monthNumber = 7;
       else if (this.month.equalsIgnoreCase("August"))
           this.monthNumber = 8;
       else if (this.month.equalsIgnoreCase("September"))
           this.monthNumber = 9;
       else if (this.month.equalsIgnoreCase("October"))
           this.monthNumber = 10;
       else if (this.month.equalsIgnoreCase("November"))
           this.monthNumber = 11;
       else if (this.month.equalsIgnoreCase("December"))
           this.monthNumber = 12;
   }

   /*Method that returns the month name*/
   public String getMonthName()
   {
       switch (monthNumber)
       {
       case 1:
           return "Janaury";
       case 2:
           return "February";
       case 3:
           return "March";
       case 4:
           return "April";
       case 5:
           return "May";
       case 6:
           return "June";
       case 7:
           return "July";
       case 8:
           return "August";
       case 9:
           return "September";
       case 10:
           return "October";
       case 11:
           return "November";
       case 12:
           return "December";
       default:
           return "January";
       }
   }
  
   public void print()
   {
       System.out.printf("Month Number : %d, Month Name: %s\n",
               monthNumber,getMonthName());
   }
   public static void main(String[] args)
   {
       /*Create an instance of Month class*/
       Month month=new Month();
       //calling paint method
       month.print();
       //set 12 as month number
       month.setMonthNumber(12);
       //calling paint method
       month.print();
       //create Random class
       Random rand=new Random();
       /*Generate 5 random number in a range of 1 to 12
       * and print the corresponding month names
       * */
       for(int i=0;i<5;i++)
       {
           /*Generate a random number in a range of 1 to 12*/
           int randomNumber=rand.nextInt(12)+1;
           /*Set random number as month number*/
           month.setMonthNumber(randomNumber);
           month.print();
       }
      
   }
}

Sample Output:

Month Number : 1, Month Name: Janaury
Month Number : 12, Month Name: December
Month Number : 10, Month Name: October
Month Number : 5, Month Name: May
Month Number : 8, Month Name: August
Month Number : 12, Month Name: December
Month Number : 2, Month Name: February