Question

Programming Assignment No. 5
Write a program that asks the user to enter a positive odd number less than 20. If the number is 5, 11 or 15, draw a square whose width is the same as the number entered, if 3, 9, or 17, draw a box (a box is a hollowed out square) with the width the same as the number entered, otherwise just present an message saying "To be determined". Write a method for the square that accepts an integer as a parameter and returns a string (use for loops), the same for the box( use while loops). No output should be done in those methods. Write a method that will ask for the number and does not return until the number entered satisfies the conditions above. Use a do while loop in that method. The method main cannot be used as one of the methods to be written. Use a switch statement to determine which shape to draw. Use the methods from the IO class used in Program 4 for input and output. Modify showMessage so that it uses a fixed-width font otherwise IO should be the same as for Program 4. The main program should be in the default package. Good program structure, adherarnce to Java conventions, and indentation are required. There will be 2 files for this assignment Program5.java which is the default package and IO.java which is in the util package. IO.java will be the same as it was in Program 4. Do not write any more methods than the ones specified. The program above is just a starting point, there are a number of changes that need to be made before. If you are not sure how to get started, a more detailed starting point is in the video.

Answer 1

Problem5.java

import java.util.Scanner;
class Problem5
{
   public static void main(String[] args)
   {  
       // Get input from user
       int n = getInput();
       switch(n)
       {
           // Square case
           case 5:
           case 11:
           case 19:
               System.out.println(square(n));
               break;
           // Box square
           case 3:
           case 9:
           case 17:
               System.out.println(box(n));
               break;
           // Final case
           default:
               System.out.println("To be determined");  
       }
   }

   public static int getInput()
   {
       // Create object for Scanner class to get input from user
       Scanner input = new Scanner(System.in);
       int n;
       do
       {
           // Promt user for input
           System.out.print("Enter odd number less than 20: ");
           // Get input from user
           n = input.nextInt();
       }while(n>20 || n%2==0);//Iterate until given condition satisified
       // Return when n satisified given condition
       return n;
   }

   public static String square(int n)
   {
       // Initialize String square with empty string
       String square = "";
       for(int i=0; i<n; i++)
       {
           for(int j=0; j<n; j++)
           {
               // Add * to square for each iteration
               square += "*";
           }
           // Add a new line to square after each row
           square += "\n";
       }
       // Return square
       return square;
   }
  
   public static String box(int n)
   {
       // Initialize String box with empty string
       String box = "";
       // Initialize i to 0
       int i=0;
       while(i<n)
       {
           // Row starts with *
           box += "*";
           int j=1;
           while(j<n-1)
           {
               // Add * if row it is first or last row, add space otherwise
               box += (i==0||i==n-1)?"*":" ";
               // Increment j by 1
               j++;
           }
           // Row ends with *
           box += "*\n";
           // Increment i by 1
           i++;
       }
       return box;
   }
}

output screenshot: