Does the Compiler Always Create a Default Constructor?

• When the class's base class defines the default constructor.
• When the class of member objects defines default constructors.
• When the class has a virtual function.
• When the class has a virtual base class.

class test
{

	public:
		void show();
		void get(int, char*, float);
	private:
		int h,
		char* ch;
		float f;
};