How to use zero length array in C

Question

We can initialize a struct with zero length array as specified in the link:

Zero-Length.

I\'m using the following structures:

typedef unsigne         


        

Answer 1

Better to use payload[] instead of payload[0] in C99. Some of C99 compilers discourage usage of zero length array. So, in case you get an error here :

typedef struct CommandHeader
{
    UINT16 len;
    UINT8 payload[0];
} CommandHeader;

you can always correct it as :

typedef struct CommandHeader
{
    UINT16 len;
    UINT8 payload[];
} CommandHeader;