c++ - Declare class object with parameters without using if...else -

c++ - Declare class object with parameters without using if...else -

i new in c++ , seek write cache simulator. constructor of class cache

cache (int, int, int, int, cache *); //declare

and in main(), trying create objects according variable:

int main() { if ( l2_size == 0 ) //only 1 level of cache { cache l1(l1_size, blocksize, l1_assoc, inclusion, 0); } else //2 level of caches { cache l2(l2_size, blocksize, l2_assoc, inclusion, 0); cache l1(l1_size, blocksize, l1_assoc, inclusion, &l2); } }

the issue not able access l1 , l2 since scope within if...else.

besides, i've tried using ? : operator implement this, still error:

no match ternary operator.

is there way this? thanks!

something this, perhaps:

cache *l2 = 0; cache *l1 = 0; if (l2_size) { l2 = new cache(l2_size, blocksize, l2_assoc, inclusion, 0); } l1 = new cache(l1_size, blocksize, l1_assoc, inclusion, l2);

i'm sure there other possibilities.

c++