What is the output of the following code snippet? class CashRegister { public: void set_item_count(int count); void view() const; CashRegister(int p); private: int item_count; }; CashRegister::CashRegister(int p) { item_count = p; } void CashRegister::view() const { cout << item_count << endl; } void CashRegister::set_item_count(int count) { item_count = count; } int main() { CashRegister reg1(20), reg2(30); reg1.set_item_count(15); reg1.view(); reg2.view(); return 0; }