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

int main(int argc, char *argv[]) {
  int i;
  int loop;
  double a, b;

  if(argc > 1)
    loop = atoi(argv[1]);

  loop = loop < 2 ? 2 : loop;
  loop = loop > 500 ? 500 : loop;

  printf("SNNS pattern definition file V3.2\ngenerated at Swarthmore by xor_patgen\n\n");
  printf("No. of patterns : %d\nNo. of input units : 2\nNo. of output units : 1\n", loop);

  for(i=0;i<loop;i++) {
    a = drand48();
    b = drand48();
    printf("# input pattern %d\n%6.3lf %6.3lf\n", i, a, b);
    printf("# output pattern %d\n%6.3lf\n", i, fabs(a - b));
  }
  printf("\n");

  return(0);
}