Invalid application of sizeof to incomplete type with a struct

Question

I have a struct where I put all the information about the players. That\'s my struct:

struct player{
   int startingCapital;
   int currentCapital;
   int s         


        

Answer 1

Your error is also shown when trying to access the sizeof() of an non-initialized extern array:

extern int a[];
sizeof(a);
>> error: invalid application of 'sizeof' to incomplete type 'int[]'

Note that you would get an array size missing error without the extern keyword.