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

int main(int argc, char** argv) {

  FILE* fp = fopen(argv[1], "r");
  fprintf(stdout, "file position is %d\n", ftell(fp));

  long N = atoi(argv[2]);
  short int buf[N];
  long nitems_read;
  bool status = true;
  long i = 0;

  while (true) {
    nitems_read = fread(buf, sizeof(short int), N, fp);
    fprintf(stdout, "frame number %d: file pos = %d\n", i, ftell(fp));
    for (long j = 0; j < nitems_read; j++) {
      fprintf(stdout, "\t%d: val = %d\n", j, buf[j]);
      if (j == 3) {
	break;
      }
    }
    if (nitems_read != N) {
      break;
    }
  }

  fclose(fp);

  // exit gracefully
  //
  return 0;
}