/*
  solution to week 4 lab - lots of loops!
*/

   import java.util.Scanner;
   import java.io.*;

    public class week04
   {
       public static void main(String[] args)throws IOException
      {
         Scanner kb = new Scanner(System.in);
         String nextLine = null;
         Scanner readLine;
         int transaction = -1;
         char first, last;  // for letters operation
         int rows, cols;  // for rectangle operation
         char ch;   // for rectangle operation
         int value;  // for graph operation
      
         do
         {
				System.out.println("\n");
            System.out.println("Please choose an operation: ");
            System.out.println("0) quit");
            System.out.println("1) letters");
            System.out.println("2) rectangle");
            System.out.println("3) graph");
            System.out.print("choice -> ");
            transaction = kb.nextInt();
				System.out.println();
            switch (transaction)
            {
               case 0:
                  System.out.println("BYE!"); 
                  break;
            
               case 1:
                  // System.out.println("print letters transaction");
                  System.out.print("enter two letters: ");
                  first = kb.next().toUpperCase().charAt(0);
                  last = kb.next().toUpperCase().charAt(0);
                  if (first > last) // switch them
                  {
                     char temp = first;
                     first = last;
                     last = temp;
                  }
                  
                  for (char c = first; c <= last; c++)
                     System.out.print(c + " ");
                  System.out.println();
                  break;  // end letters case
               
               case 2:
                  // System.out.println("rectangle transaction");
                  System.out.print("enter height, width & display character: ");
                  rows = kb.nextInt();
                  cols = kb.nextInt();
                  ch = kb.next().charAt(0);
                  for (int r=0; r < rows; r++)
                  {	
                     for (int c=0; c < cols; c++)
                        System.out.print(ch);
                     System.out.println();
                  }
                  break;  // end rectangle case
               
               case 3:
                  // System.out.println("bar graph transaction");
                  System.out.print("enter all the numbers to process on one line: ");
                  kb.nextLine();  // skip end of line character after menu choice
                  nextLine = kb.nextLine();
                  readLine = new Scanner(nextLine);
                  while (readLine.hasNext())
                  {
                     value = readLine.nextInt();
                     for (int i=0; i<value; i++)
                        System.out.print("*");
                     System.out.println();
                  }
                  break;   // end graph case
               
               default: System.out.println("ERROR: invalid transaction code");
            } //end switch
         
         } while (transaction != 0);  // end do loop
      
      } //end main
   }