Thread: Programming crashing error

  1. #1
    Registered User
    Join Date
    Sep 2009

    Question Programming crashing error

    Basically I'm supposed to make a spell check program and whatever the word is misspelled, it will print out the words from dictionary.txt to match the it (that's where the function will take its role..)

    But it keeps crashing whenever I write the first word.

    Can anyone help me why my program keeps crashing?

    #define SIZE 40
    //Functions that will be used
    int substring (char shortstr[], char longstr []);
    int subsequence (char shortstr[], char longstr[]);
    int permutation (char string1[], char string2[]);
    int matchscore (char string1[], char string2[]);
    int main () {
            //This will read the txt.file
        FILE *ifp;
        ifp = fopen ("dictionary.txt", "r");
        int marker;
        char possible_words[3000][30];
        char dictionary[30000][30];
        char string2[30];
        int ans;
        char word[30];
        int i, max_of_words;
        int length1, length2;
        //This will read the max of words in the dictionary
        fscanf(ifp, "%d", &max_of_words);
        //I put the strings ina  here to read all of the words from the txt. file.
        for (i=0; i<max_of_words ; i++) {
            fscanf(ifp, "%s", dictionary[i]);
        printf("Welcome to the Spell Checker!\n");
        printf("The dictionary has been loaded\n\n");
        do {
        //resets the words for display
        //for(i=0; i<30000; i++)
         //strcpy(possible_words[i]," "); 
           printf("Please enter the word you would like checked\n");
           scanf("%s", word);
           length1 =strlen(word);
           //This will set the loop whether the word matches the dictionary
           for (i=0; i<max_of_words ; i++) {
               length2 = strlen(string2);
                 if (strcmp(string2, word) == 0){                         
                   printf("Great, %s is in the dictionary!\n", word);
                 else if (length1==length2){
                      if (matchscore(word, string2) ==1 )
                      else if (permutation(word, string2)==1)
                        strcat(possible_words[i], string2); 
                 else if (length1>length2) {
                      if (substring(string2, word) ==1 )
                        strcat(possible_words[i], string2);
                      else if (subsequence (string2, word) == 1)
                        strcat(possible_words[i], string2);
                 else if (length1<length2) {
                      if (substring(word, string2)==1)
                        strcat(possible_words[i], string2);
                      else if (subsequence (word, string2) ==1)
                        strcat(possible_words[i], string2);
         if (marker==0){
           for (i=0;i<max_of_words;i++) {
               printf("%s", possible_words[i]);
                if (strcmp(possible_words[i], "\0") != 0)
           printf("Would you like to enter another word? (Yes=1/No=0)\n");
           scanf("%d", &ans);
        } while(ans!=0);
        return 0;

  2. #2
    Jack of many languages Dino's Avatar
    Join Date
    Nov 2007
    Katy, Texas
    For one, you are using strcat() on an uninitialized array of possible_words[i]. You should be using strcpy().
    Mac and Windows cross platform programmer. Ruby lover.

    Quote of the Day
    12/20: Mario F.:I never was, am not, and never will be, one to shut up in the face of something I think is fundamentally wrong.

    Amen brother!

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