Recently I learnt about comparators in cpp from STL.
I came to know we can use greater<>() as third argument for sorting instead of writing own logic.
Just curious to know how many inbuilt comparators are there in cpp.
>Solution :
The standard library defines pretty much what you would expect as analogues to the built-in operators:
std::equal_to // ==
std::not_equal_to // !=
std::less // <
std::less_equal // <=
std::greater // >
std::greater_equal // >=
Since C++20 also constrained versions of all these comparison function objects in the std::ranges namespace as well as std::compare_three_way, which is the analogue to the built-in three-way comparison operator <=>.
For a reference of these function objects see https://en.cppreference.com/w/cpp/utility/functional#Comparisons.