explicit in class

[NavidTak]

i was reading a source and hit to following syntax
in a class

 class Hello {

	public:
		explicit Hello(){}



};

why the person who has written this class use this syntax?

[AbstractionAnon]

There's a good explanation here:
http://www.cplusplus.com/forum/general/168292/

[mbozzi]

It's useless because there are no parameters to the default constructor.
If the constructor marked explicit has parameters, then it will work normally.