// Example of command line parameters, usage, atof(), and assert()
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>

int main(int argc, char *argv[])
{
  int    i;
  double shoeSize;

  if (argc != 3)
  {
    printf("usage: %s name shoeSize \n", argv[0]);
    return(1);
  }

  shoeSize = atof(argv[2]);

  assert(shoeSize > 0.0);

  printf("Name      = %s \n", argv[1]);
  printf("Shoe size = %f \n", shoeSize);

  return(0);
}