Initializing variable length array [duplicate]
Solution 1:
You'll have to use memset:
memset(board, 0, sizeof board);
Solution 2:
VLAs cannot be initialized by any form of initialization syntax. You have to assign the initial values to your array elements after the declaration in whichever way you prefer.
C11: 6.7.9 Initialization (p2 and p3):
No initializer shall attempt to provide a value for an object not contained within the entity being initialized.
The type of the entity to be initialized shall be an array of unknown size or a complete object type that is not a variable length array type.