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

/* Maximum length (not counting trailing NULL) of a word */
#define MAX_LENGTH 20

/* Structured type for a dictionary entry */
typedef struct {
  char english[MAX_LENGTH+1] ; /* English word */
  char latin[MAX_LENGTH+1]; /* Latin word */
  int decl; /* declension of Latin word */
} dictentry_t;

/* maximum size of dictionary */
#define DICT_SIZE 40

/* global array holding dictionary */

dictentry_t dict[DICT_SIZE] = {
  { "daughter", "filia", 1 },
  { "gate", "porta", 1 },
  { "master", "dominus", 2 } };

/* number of entries currently in dictionary */

int num_entries = 3;

/* Lookup takes a string representing an English word, and
   tries to find it in the dictionary, by simple linear search.
   If it succeeds, it returns the index of the dictionary entry;
   if it fails, it return -1. */
int Lookup(char *e) {
  /* BEGIN ANSWER (a) -- do not delete this line */

  // ADD YOUR CODE HERE

  /* END ANSWER (a) -- do not delete this line */
}

/* ReadDict() reads the dictionary file from standard input.
   It should parse each line into the next available dictionary entry.
   If a word in the file exceeds MAX_LENGTH, or if there are more than 
   DICT_SIZE lines, or if a line does not contain the necessary three fields,
   ReadDict() should print a message to standard output and return 0;
   if it parses all lines successfully it should return 1. 
*/

int ReadDict(char *filename) {
  FILE *dictfile;
  dictfile = fopen(filename,"r");
  if ( dictfile == NULL ) {
    printf("Error opening dictionary file\n");
    return 0;
  }
  num_entries = 0; /* clear the built-in dictionary */
  while ( !feof(dictfile) ) {
    /* BEGIN ANSWER (c) -- do not delete this line */

    // ADD YOUR CODE HERE

    /* END ANSWER (c) -- do not delete this line */
  }
  return 1;
}

int main(int argc, char **argv) {
  if ( argc > 1 ) {
    if ( argc != 2 ) {
      printf("Bad number of arguments!\n");
      return EXIT_FAILURE;
    }
    if ( ReadDict(argv[1]) == 0 ) {
      printf("ReadDict() failed\n");
      return EXIT_FAILURE;
    }
  }
  printf("Printing out the dictionary.\n");
  int i;
  for (i=0 ; i < num_entries; i++) {
    dictentry_t *d = &dict[i];
    printf("%s %s %d\n",d->english,d->latin,d->decl);
  }

  /* take words from user and look them up */
  while ( 1 ) {
    char tmpbuf[1024];
    printf("Enter English word to look up: ");
    if ( scanf(" %s",tmpbuf) != 1 ) {
      /* end of input */
      return EXIT_SUCCESS;
    }
    int i = Lookup(tmpbuf);
    if ( i < 0 ) {
      printf("No translation found!\n");
      /* If the input word ends in "s", assume it's a plural.
         Remove the "s" and try again. If we find the word
         this time, then print out the plural form of its 
         Latin translation, as specified in the question.
      */
      /* BEGIN ANSWER (b) -- do not delete this line */

      // ADD YOUR CODE HERE

      /* END ANSWER (b) -- do not delete this line */

    } else {
      printf("Latin translation is: %s\n",dict[i].latin);
    }
  }

  return EXIT_SUCCESS;
}