What is the difference between std::set and std::vector?

Question

I am learning STL now. I read about set container. I have question when you want to use set? After reading description of set it looks like it is u

Answer 1

form cpluplus.com set:

Sets are containers that store unique elements following a specific order.

so the set is ordered AND item are uniquely represented

while vect:

Vectors are sequence containers representing arrays that can change in size.

so vector is in the order you fill it AND can hold multiple identical items

prefer set:

• if you wish to filter multiple identical values
• if you wish to parse items in a specified order (doing this in vector requires to specifically sort vector).

prefer vector:

• if you want to keep identical values
• if you wish to parse items in same order as you pushed them (assuming you don't process the vector order)