//  Rectangles.m   Copyright (c) Kari Laitinen

//  http://www.naturalprogramming.com

//  2013-05-31  File created.
//  2013-06-09  Last modification.

//  This program contains a definition of a simple class 
//  named Rectangle.

//  Rectangle objects are printed rectangles in a terminal window.
//  It is possible to specify a width and height and a filling
//  character for each Rectangle object.

//  This program can be compiled and run in a MacOS X terminal window
//  with the commands

//  gcc Rectangles.m -o a.out -framework Foundation
//  ./a.out

#include  <stdio.h>
#import <Foundation/Foundation.h>


@interface Rectangle : NSObject
{
   int  rectangle_width ;
   int  rectangle_height ;
   char  filling_character ;
   
}

- (void) initialize_width: (int) given_rectangle_width
               and_height: (int) given_rectangle_height
               and_filler: (char) given_filling_character ;

- (void) print_rectangle ;

@end


@implementation Rectangle

- (void) initialize_width: (int) given_rectangle_width
               and_height: (int) given_rectangle_height
               and_filler: (char) given_filling_character
{
   rectangle_width = given_rectangle_width ;
   rectangle_height   =  given_rectangle_height ;
   filling_character  =  given_filling_character ;   
}

- (void) print_rectangle
{
   int number_of_rows_printed  =  0 ;
   
   while (  number_of_rows_printed  <  rectangle_height )
   {
      printf( "\n      " ) ;

      int number_of_characters_printed  =  0 ;
      while (  number_of_characters_printed  <  rectangle_width )
      {
         printf( "%c", filling_character ) ;
         
         number_of_characters_printed  ++ ;
      }
      
      number_of_rows_printed ++ ;
   }

   printf( "\n" ) ;
}

@end


int main( void )
{
   Rectangle*  first_rectangle = [ Rectangle alloc ] ;

   [ first_rectangle initialize_width: 7
                     and_height: 4 and_filler: 'Z' ] ;
   [ first_rectangle print_rectangle ] ;
   [ first_rectangle release ] ;

   Rectangle*  second_rectangle = [ Rectangle alloc ] ;


   [ second_rectangle initialize_width: 12
                      and_height: 3 and_filler: 'X' ] ;
   [ second_rectangle print_rectangle ] ;
   [ second_rectangle release ] ;
   
   return 0 ;
}

/*  NOTES

   This is one of my first attempts to create an Objective-C program.

   The following page was very useful to learn to compile with
   command line commands
   http://blog.lyxite.com/2008/01/compile-objective-c-programs-using-gcc.html

   The following page contains discussion about writing
   and calling instance methods in O'C
   http://mobile.tutsplus.com/tutorials/iphone/learn-objective-c-day-4/
*/