c++ - Sort Vector<MyClass> on one of MyClass's data members? -

this question has answer here:

• how sort vector of pairs based on second element of pair? 7 answers
• standard library sort , user defined types 2 answers

i create class, call myclass has 3 data members- a, b , c. wish put many myclass objects in std::vector<myclass> , sort vector according data members.

is there elegant way of doing using stl? didn't want re-invent wheel , sure can't first. in java guess use comparator.

the following should trick:

bool operator < (myclass const& lhs, myclass const& rhs) {     return lhs.a < rhs.a; } 

std::sort requires value_type of iterators less-than comparable, or in more technical terms, must form strict weak ordering. given code above, should able sort other type:

std::sort(std::begin(my_classes), std::end(my_classes)); 

assuming my_classes std::vector.