How to use vector::push_back()` with a struct?

Question

How can I push_back a struct into a vector?

struct point {
    int x;
    int y;
};

std::vector a;

a.push_back( ???          


        

Answer 1

point p;
p.x = 1;
p.y = 2;

a.push_back(p);

Note that, since a is a vector of points (not pointers to them), the push_back will create a copy of your point struct -- so p can safely be destroyed once it goes out of scope.