Constructor

Question

is constructor always public?

Answer 1

In singleton design pattern , we have constructor as private

Answer 2

If you want to create object of given class- yes.
But sometimes when you do not want to create object, you may make it private.
(I wrote a code in which class has private ctor)
https://code.sololearn.com/cub4oA2riU4b/?ref=app

Answer 3

@Vignesh can you give source of such an implementation of Singleton? Everyone and every site I've been learning from told me that ctor in singleton is private.

Answer 4

sorry @jakub stasiak typo error it is Private..
link :
http://www.yolinux.com/TUTORIALS/C++Singleton.html
if you want to prevent your object from being copied you have to declare the constructor as private.