Thread: VERY simple problem, can't figure it out for the life of me. :[

Ok, so all i'm trying to do is make a linked list of dictionary entries, and for some reason allocating the second or third linked list kills my program. I have no idea why. Here is the code:

header file:

Code:

#ifndef WORDSTAT_H
#define WORDSTAT_H

#define MAX_LINE 1024
/*define structure and functions*/

#define TS "?,.;\"': \n\t!()-<>[]{}1234567890"


struct wordEntry{
    char *word;
    int count;
    struct wordEntry *next;
};

typedef struct wordEntry entry;

#endif

source file:

Code:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "template_wordstat.h"

void append(entry * beginning, char * nextWord);

int main(int argc, char* argv[])
{
    FILE* fp;
    char line[MAX_LINE];
    int i = 0;
    char *nextWord;
    entry *start = NULL;


    /* Checks for correct usage and handles arguments accordingly */

    if (argc != 2) {
        fprintf(stderr, "Error: wrong number of parameters.\n");
        return -1;
    }

	if (strcmp(argv[1],"-h") == 0) {
        	printf("Usage: wordstat FILE_NAME\n");
        	return 0;
   	}

    if ((fp=fopen(argv[1],"r")) == NULL) {
        fprintf(stderr, "Error: cannot open file %s.\n", argv[1]);
        return -2;
    }

    while (! feof(fp)) {

        /* reads one line at a time */

            if (fgets(line, MAX_LINE, fp) == NULL)
                    break;
            if (line[0] == '\n')    /* empty line */
                    continue;

        /* extract words from the line and handle the words	*/

        nextWord = strtok (line, TS);

        /* if the first token is empty, then there are no words */

        if(nextWord == NULL){
            fprintf(stderr, "File contains no words.\n");
            return -2;
        }

        /* go through each word and build linked list with entries*/

        while(nextWord != NULL){

            append(start, nextWord);
            printf("%s\n", nextWord);
            nextWord = strtok (NULL, TS);
        }
    }

	/*	sorting and printing */

	fclose(fp);

    	return 0;
}

void append(entry * beginning, char * nextWord) {
    entry *temp,*marker;

    temp = (entry *)malloc(sizeof(entry));
    strcpy(temp->word, nextWord);
    temp -> count = 0;
    temp -> next = NULL;

    marker = beginning;

    /* If the very first node is empty */
    if (beginning == NULL) {
        beginning = temp;
        beginning -> next = NULL;
    }
    else {
        while(marker -> next != NULL)
            marker = marker -> next;

       marker -> next = temp;
    }
 }

any help would be appreciated. I REALLy don't seem to get pointers :[

EDIT: I revised the code, it still doesn't work.