#include <fstream.h>
#include <iostream.h>
#include <stdlib.h>

main(int argc,char *argv[])

{
    int i,j,xres,yres,maxintensity,**image;
    ofstream fp;

// xres, yres, maxintensity, and image[][] must already be defined

    fp.open(argv[1]);
    fp << "P5" << endl;
    fp << "#Created 1/2/02" << endl;  // Or some other comment
    fp << xres << " " << yres << endl;
    fp << maxintensity << endl;      // Almost always equals 255
    for (i=0;i<xres;i++)
       for (j=0;j<yres;j++) 
          fp << (unsigned char) image[i][j]; 

}