Question

I am trying to allocate a 2D dimension array of File Descriptors… So I would need something like this
fd[0][0]
fd[0][1]

I have coded so far:

void allocateMemory(int row, int col, int ***myPipes){
    int i = 0,i2 = 0;
    myPipes = (int**)malloc(row * sizeof(int*));
    for(i = 0; i < row;i++){
       myPipes[i] = (int*)malloc(col * sizeof(int));
    }
  }

How can I set it all too zeros right now I keep getting a seg fault when I try to assign a value…

Thanks

Answer 1

short answer: change your innermost malloc to a calloc.

long answer provided by the c faq:
http://c-faq.com/~scs/cclass/int/sx9b.html

What you need to understand is that C doesn’t really have a way to allocate a true multidimensional array. Instead, you just have a pointer to an array of pointers. Treat your data structure as such and you will be fine.