Thread: malloc 2d array

What exactly am I doing wrong here?
I need to dynamically allocate just enough space for each string on each line.

My teacher said to start with dynamically allocating enough space for 100 lines which I think I did right. Then I assumed next while I'm reading the file I'd take each line and use malloc with enough memory just to store each string.

With my code right now, I run it on Dev-C and it's printing out 104 lines. I run it on gcc and it's printing out 120 lines. I would think since I made memory for 100 lines up top that's all it should print out? (the file I'm reading has about 600 lines but I haven't gotten as far as to keep reallocating more memory)

Code:

int main(){
    FILE *fp;
    char buffer[50];
    char **words;
    int i=0;
    
   words = malloc(100 * sizeof(char *) );
    
    if ( (fp = fopen("words.txt", "r" )) == NULL )
    {
     printf("Couldn't open file\n");
     exit(1); 
    }
    
    while( fgets(buffer, sizeof(buffer), fp))
    {
           words[i] = malloc(strlen(buffer)*sizeof(char));
           strtok(buffer, " \n");
           strcpy(words[i], buffer);
           printf("%d: %s\n", i+1, words[i]);
           i++;
    } 
getchar();
return 0;
}