I have a list of 2D arrays:
float a[][9] = { ... }
float b[][9] = { ... }
float c[][9] = { ... }
I want to have another array of pointers that point to each of the 2D arrays, like this:
what_should_be_here?? arr[] = { a, b, c }
How to achieve this?
Use typedef to simplify declaration. Each of the element of arr is float (*)[9]. Say this type is SomeType. Then {a,b,c} means you need an array of three elements of type SomeType.
SomeType arr[] = {a,b,c};
Now the question is, what is SomeType? So here you go:
typedef float (*SomeType)[9]; //SomeType is a typedef of `float (*)[9]`
SomeType arr[] = {a,b,c}; //this will compile fine now!
As I said, use typedef to simplify declaration!
I would choose a better name for SomeType:
typedef float (*PointerToArrayOf9Float)[9];
PointerToArrayOf9Float arr[] = {a,b,c};
That is a longer name, but then it makes the code readable!
Note that without typedef, your code will look like this:
float (*arr[])[9] = {a,b,c};
which is UGLY. That is why I will repeat:
typedef to simplify declaration!Hope that helps.
