Help understanding classes

[Andrewcen16]

i need some help understanding how to use different classes togther. Assume that the class "Employee" is already built and just gets the name in a string variable.
How would i go about using the class below to access that in a vector.
If you could show the format of how to write that member function/ constructor, that would be really helpful. I have looked online but can't seem to find a good explantion with examples.

class Staff { public:
private:
vector<Employee> members; };