std::find 'error no matching function'

Question

Say that I have a class A and a class B that look like that:

Class A { private:     int a; public : bool operator==(const A &) const; //other methods(...) }  Class B { private: std::vector<A> v; public: std::vector<A> &get_v() {return v;}; const std::vector<A>& get_v() const; } 

Now when I do that:

B b; std::vector<A>::iterator it; it=std::find (b.get_v().begin(), b.get_v().end(), an item of class A); 

The error I get is

error: no matching function for call to 'find(std::vector<A>::iterator, std::vector<A>::iterator, A&) 

Am I missing something ? Thanks

Answer 1

You forgot to #include <algorithm>.

Answer 2

I think you forgot include header <algorithm>