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

struct person {
  char* fname;
  char* lname;
};

struct person* makePerson(char* first_name, char* last_name) {
  struct person* p = malloc(sizeof(struct person));
  if (!p) {
    fprintf(stderr, "Unable to allocate person.\n");
    exit(1);
  }
  p->fname = first_name;
  p->lname = last_name;
  return p;
}

int main(int argc, char** argv) {
  if (argc != 3) {
    printf("Usage:\n\t./person <first name> <last name>\n");
    exit(1);
  }

  struct person* p = makePerson(argv[1], argv[2]);
  printf("First name = '%s', Last name = '%s'\n", p->fname, p->lname);
  free(p);
  return 0;
}