/*********************************
 ** File 2darray.c
 ** Author: S. Evans
 ** Date: 10/31/06
 ** Section: 02XX & 201H 0101
 ** E-Mail: bogar@cs.umbc.edu
 **
 ** This file demonstrates dynamic memory
 ** allocation of a 2 dimensional array
 ** of chars
*******************************/
 
#include <stdio.h>
#include <stdlib.h>
 
/***************
** Function: GetTwoDSpace()
**
** GetTwoDSpace() gets the memory space needed to hold the 2 dimensional
** array of ints and returns the pointer which will become the name of
** the array.
**
** Inputs: Number of rows to be in the array
**         Number of columns to be in the array
** Output: The pointer to the memory
********************************/
char **GetTwoDSpace(int rows, int cols)
{
   char **array;
   int i;

   /* Get the space for the array of pointers to int */
   array = (char**)malloc(rows * sizeof(char*));
   if(array == NULL)
   {
      fprintf(stderr, "Error getting space for 2-d array of ints\n");
      exit(-1);
   }
                                                                               
   /* Get the space for all of the one dimensional arrays of ints */
   for(i = 0; i < rows; i++)
   {
      array[i] = (char*)malloc(cols * sizeof(char));
      if(array[i] == NULL)
      {
         fprintf(stderr, "Error getting space for 2-d array of ints\n");
         exit(-1);
      }
   }
                                                                               
   return array;
}
                                                                             
/***************
** Function: FreeTwoDSpace()
**
** FreeTwoDSpace() frees the memory space of a 2 dimensional
** array of ints.
**
** Inputs: Number array to be freed
**         Number of rows in the array
** Output: None
********************************/
void  FreeTwoDSpace(char **array, int rows)
{
   int i;
                                                                            
   for(i = 0; i < rows; i++)
   {
      free(array[i]);
   }
                                                                               
   free(array);
}