Except that as of C11 variable length arrays (VLAs) are optional. So with a fully standard compliant C11 compiler your code could potentially fail. While the ol

Except that as of C11 variable length arrays (VLAs) are optional. So with a fully standard compliant C11 compiler your code could potentially fail. While the old way of using arrays of arrays will work with any C compiler. (Not that important if you use a pure C compiler, but your code will also fail if you use a C++ compiler.)