Thread: Reading from file, segmentation fault

I'm reading text from a file into an array of strings, when I run the program like this everything works fine, but if I comment out the lines "char letter = 'A'" and the printf two lines below it, there is a seg fault. Why is this? That was just to letter the lines, I don't see how this could result in a seg fault.

Code:

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


int main(int argc, char *argv[]){
   FILE *file = fopen("file", "r");
   if(file == NULL){
      puts("File not found");
      return 0;
   }


   char string[100], **array;
   int idx = 0;
   while(idx < 100 && fgets(string, 100, file) != NULL){
      array[idx] = (char*) malloc(strlen(string));
      string[strlen(string) - 1] = '\0';
      strcpy(array[idx++], string);
   }  


   char letter = 'A';
   for(idx = 0; idx < 5; idx++){
     printf("%c. ", letter++);
      puts(array[idx]);
   }
   fclose(file);
   return 0;
}

Hmm, just wondering why you strcpy your string into an address 1 ahead of the one you just allocated?