将内存分配给3维char数组会导致分段错误

Question

As a spin of of an earlier question, I have run into some problems regarding allocating memory to a 3 dimensional array.

I am working on a project where we need to do some work on a text. To do this, we need to split the text into smaller sections, and process the text word for word. To save these smaller pieces of text, we have a 3D array, a list of sections each containing a list of the words in the section.

But I get a segmentation fault when I try to allocate memory for the individual words using malloc() .

localText->list[i][n] = malloc(100 * sizeof(char));

Here is the entire code.

typedef struct {
   char name[100];
   char  ***list;
}text;

int main(){
   int i = 0, n, z,wordCount, sections;
   FILE *file;
   text *localText;

   openFile(&file, "test.txt");
   wordCount = countWords(file);

   sections = (wordCount / 50) + 1;

   localText = malloc(sizeof(text));
   localText->list = malloc(sections * sizeof(char **));

   for(i = 0; i < sections; i++)
      localText->list[i] = malloc(50 * sizeof(char *));
      for(n = 0; n < 50; n++)
         localText->list[i][n] = malloc(100 * sizeof(char));

   readFileContent(file, localText->list, 50);

   freeText(localText);

   return 1;
}

Answer 1

You're missing some braces:

for(i = 0; i < sections; i++) {
// ...
}