al_sq_point.c
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	/**********************************************************/
	/* */
	/* FUNCTION: alloc_square_point */
	/* */
	/* PURPOSE: Allocates a square of points in memory */
	/* */
	/* INPUT: nbr_lin = number of lines */
	/* nbr_col = number of columns */
	/* */
	/* RETURN: square = pointer to matrix of points */
	/* (NULL if memory allocation failure) */
	/* */
	/* VERSION: 1.1 March 1992 */
	/* */
	/* AUTHOR: JP KNEIB */
	/* */
	/**********************************************************/
	#include <stdlib.h>
	#include "structure.h"

	struct point **al_sq_point(int nbr_lin, int nbr_col)
	{
	struct point **square;
	register int i, j;

	square = (struct point **) malloc((unsigned) nbr_lin
	sizeof(struct point ));

	if (square != 0)
	{
	for (i = 0; i < nbr_lin; i++)
	{
	square[i] = (struct point *)malloc((unsigned) nbr_col
	* sizeof(struct point ));
	if (square[i] == 0) square = 0;
	}
	}

	for (i = 0; i < nbr_lin; i++)
	for (j = 0; j < nbr_col; j++)
	square[i][j].x = square[i][j].y = 0.0;

	return( square);
	}