CODEWITHSUNDEEP
c
Iffat Fatima
Iffat Fatima

Reputation: 1748

Error on dynamically allocating memory to function pointer array

int kpSize = 4;
int kpIdx = 0;

typedef int (*EventHandler) (void *);

EventHandler *keyFuncArray = (EventHandler *) malloc(sizeof(EventHandler) * kpSize);

I get the following error on compiling, error C2099: initializer is not a constant on the following line 

EventHandler *keyFuncArray = (EventHandler *) malloc(sizeof(EventHandler) * kpSize);

Upvotes: 0

Views: 317

Answers (2)

jblixr
jblixr

Reputation: 1395

You can only do declarations in the global scope. So a function call can't execute in the global scope. As malloc() is also a function call, it couldn't execute.

So you can declare the global pointer variable and initialize it in any of your functions (not restricted to main only). Since the pointer is global it is available globally after initialization to any of your functions.

Upvotes: 2

LPs
LPs

Reputation: 16223

You cannot init with malloc a global variable.

You must write, eg:

EventHandler *keyFuncArray;

int main ()
{
    keyFuncArray = malloc(sizeof(EventHandler) * kpSize)

   // STUFF:..

   return 0;
}

Take a look also to: Do I cast malloc return?

Upvotes: 3

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