/* Sequential Files #3 */

#include <stdio.h>
#include <conio.h>
#include <time.h>
#include <math.h>
#include <limits.h>
#include <stdlib.h>

void Pause()
{
	printf ("\n Press Anykey to continue...");
	getch ();
}

int main ()
{
	clrscr ();
	FILE *fp;
	const SIZE = 10;
	int i, value, array[SIZE];
	const row = 4;
	const col = 6;
	int matrix[row][col];
	for (i = 0; i < SIZE; i++)
		{
		array[i] = 2*i;
		}
	fp = fopen ("dumb.txt", "w+b");
	if (!fp)
		{
		fprintf (stderr, "Error opening file.");
		exit (1);
		}
	//SIZE = row * col;
	//fwrite (matrix, sizeof (int), SIZE, fp);
	for (i = 0; i < row; i++)
		{
		int j;
		for (j = 0; j < col; j++)
			{
			fwrite (&matrix[i][j], sizeof (int), SIZE, fp);
			}
		}
	fclose (fp);

	int size;
	fp = fopen ("numb.txt", "rb");
	if (!fp)
		{
		fprintf (stderr, "Error opening file.");
		exit (1);
		}
	fread (&SIZE, sizeof (int), 1, fp);
	int *array2;
	array2 = (int *) malloc (size * sizeof (int));
	fread (array2, sizeof (int), size, fp);
	fclose (fp);
	puts ("Array values:");
	for (i = 0; i < size; i++)
		printf ("%5d", array2[i]);
	free (array2);

	//fwrite (array, sizeof (int), SIZE, fp);
	//fwrite (sizeof (int), array, SIZE, fp);
	rewind (fp);
	for (i = 0; i < SIZE + 1; i++)
		{
		fread (&value, sizeof (int), 1, fp);
		//fread (sizeof (int), value, 1, fp);
		printf ("%5d", value);
		}
	fclose (fp);
	printf ("\n");
	fp = fopen ("dumb.txt", "r+b");
	if (!fp)
		{
		fprintf (stderr, "Error opening file.");
		exit (1);
		}
	fwrite (&SIZE, sizeof (int), 1, fp);
	fwrite (array, sizeof (int), SIZE, fp);
	rewind (fp);
	for (i = 0; i < SIZE + 1; i++)
		{
		fread (&value, sizeof (int), 1, fp);
		printf ("%5d", value);
		}
	fclose (fp);

	/*
	char name [80];
	puts ("What is your name?");
	gets (name);
	puts ("\nHello,");
	puts (name);
	*/

	Pause ();
	return 0;
}