Variable two dimensional array printing "subscript of pointer to incomplete type" when accessed

Question

I am declaring a two dimensional array as such:

char arr[10][10]; arr[0][0] = 'X'; 

Now I print in debugger;

(lldb) po arr[0][0] 'X' 

Awesome!! No problem.

Now I am declaring a two dimensional array as such:

int col = 10; int row = 10; char arr[row][col]; arr[0][0] = 'X'; 

Now I print in debugger;

(lldb) po arr[0][0] error: subscript of pointer to incomplete type 'char []' error: 1 errors parsing expression 

Why??

Answer 1

The debugger doesn't know exactly how big the array is, so you need to apply a cast:

(gdb) p ((char (*)[10])arr)[0][0] $2 = 88 'X'