/* ----------------------------------------
Image Processing pa1.c
PGM Format Gray Image Data Generation
Ichinoseki National College Advanced Course
------------------------------------------ */

#include <stdio.h>
#include <stdlib.h>
#include <math.h>  

main(argc,argv)
int argc;
char *argv[]; 
{
	static int  i,j,m;
	static int pixel,line;
	FILE *fp1;

	/* Command parameter check  */
	if (argc!=4){
		printf("Usage : command pixel line output_file\n");
		return 1;
	}

	/* Image size parameter load */
	sscanf(argv[1],"%d",&pixel);
	sscanf(argv[2],"%d",&line);

	/**/
	if ( pixel*line>1000*1000){
		printf("Over image size\n");
		return 1;
	}

	/* Output image file name read */
	if (( fp1=fopen(argv[3],"w") )==NULL){
		printf("Can't open output_file\n");
		return 1;
	}

	/* pnm(pgm) header code output */
	fprintf(fp1,"P5\n");   /* Gray binary image data */
	fprintf(fp1,"# INCT\n"); /* Comment */
	fprintf(fp1,"%s %s\n",argv[1],argv[2]); /* Pixel Line Image size */
	fprintf(fp1,"255\n"); /* Imade data maximum value */

	/* Gray binary image data output */
	for (i=0; i<line; i++)
	{
	for (j=0; j<pixel; j++)
	{
		/*pixcel=150の点に黒、それ以外の点は白を書き込む*/
		m=(j==150)?0:255;
		putc(m,fp1);/**/
	}
	}
	fclose(fp1);
	return 0;
}