#include <stdlib.h>
#include <stdio.h>
#include "project.h"

int main(int argc, char **argv) {
	int		n,m;
	int		smelly;
	char		c;
	int		i,j;
	int		*image;

	//parse the input
	if (!(getchar() == 'P' && getchar() == '5')) {		//pgm files start with "P5"
		fprintf(stderr,"Need pgm data from stdin\n");
		return(EXIT_FAILURE);
	}
	NEXTLINE();
	while ((c = getchar()) == '#') NEXTLINE();		//ignore comments
  	ungetc(c,stdin);
	scanf("%i%i%i",&n,&m,&smelly);				//parse the important numbers
	NEXTLINE();
	fprintf(stderr,"%ix%i image read. %i - should be 255 :-)\n",n,m,smelly);

	//prepare the Row-major Format 2-D array
	image = (int *)malloc(sizeof(int)*n*m);

	//fill up the input array using the pgm picture
	for (j=0; j<m; j++) {
		for(i=0; i<n; i++) image[j*n+i] = getchar();
	}

  	fprintf(stderr,"Size of read image is %d by %d\n",n,m);
  
  	//output a graph of a horizontal cross-section of the image
   	j = m/2;
   	for (i = 0; i < n; i++)	 PRINT_DATA(i,image[j*n+i])

	//free memory
	free(image);
	
	return(EXIT_SUCCESS);
}