Have I somehow altered ctype.h? - c

Question

#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "dictionary.h"
#define HASH_SIZE 5
// prototype
int hash(char *word);
// counter
int counter;
// node
typedef struct node
{
char word[LENGTH + 1];
struct node *next;
} node;
// hash table
struct node *hashtable[HASH_SIZE];
/*
* Returns true if word is in dictionary else false.
*/
bool
check(const char *word)
{
//make a writable word (palabra)
int len = strlen(word);
char palabra[len + 1];
//int i;
// make la palabra all lowercase letters
for ( int i = 0; i < len; i++)
{
if (isalpha(palabra[i]) || palabra[i] == '\'')
palabra[i] = tolower(word[i]);
}
//palabra[i] = (char) "\0";
// hash the word
int value = hash(palabra);
// let's look at the first node in the bucket
struct node *n;
if (hashtable[value] == NULL)
return false;
else
n = hashtable[value];
// iterate through the bucket to see if the word is there
while (strcmp(palabra, n->word) != 0 && n->next != NULL)
{
n = n->next;
}
// if the word is found, print true, else false
if ( strcmp(palabra, n->word) ==0 )
return true;
else
return false;
}
/*
* Loads dictionary into memory. Returns true if successful else false.
*/
bool
load(const char *dictionary)
{
// open the dictionary
FILE *dict = fopen(dictionary, "r");
if(dict == NULL)
{
printf("Could not open %s.\n", dictionary);
return false;
}
// set all values in the hash table to null
for(int i = 0; i < HASH_SIZE; i++)
{
hashtable[i] = NULL;
}
// set the counter to 0
counter = 0;
// iterate through the words in the dictionary
while (!feof(dict))
{
//declare a node
node *n = malloc( sizeof(node) );
// copy the word into the node
fscanf(dict, "%s", n->word);
// hash the word, baby!
int hash_value = hash(n->word);
// start saving addresses to the hashtable
n->next = hashtable[hash_value];
hashtable[hash_value] = n;
// that's one more!
counter++;
}
// testing
printf("Starting the test.\n");
for ( int i = 0; i < HASH_SIZE; i++)
{
struct node *q = hashtable[i];
while (q != NULL)
{
printf("%s\n", q->word);
q = q->next;
}
}
printf("Ending the test.\n");
fclose(dict);
return true;
}
/*
* Returns number of words in dictionary if loaded else 0 if not yet loaded.
*/
unsigned int
size(void)
{
return counter;
}
/*
* Unloads dictionary from memory. Returns true if successful else false.
*/
bool
unload(void)
{
// TODO
return false;
}
/*
* Returns a hash value for a word.
*/
int
hash(char *word)
{
// hash value and length of word
int value = 0;
int len = strlen(word);
// iterate through letters, adding ASCII values
for(int i = 0; i < len; i++)
{
int letter = (int) word[i];
value += letter;
}
// make sure the value is less than 100 & return
value = value%HASH_SIZE;
return value;
}
When I run my code, I receive this error message:
In file included from /usr/include/ctype.h:28:0,
from speller.c:10:
/usr/include/bits/types.h:31:1: error: expected '=', ',', ';', 'asm' or 'attribute' before 'typedef'
Does this mean that I have somehow managed to alter the ctype.h library? If so, how do I fix it?

Answer 1

Aha! Gordon, you solved it! I found some stray characters typed just above the #include that were causing the problem. Thanks!