class std::vector has no member named [closed]

Answer 1

with coffe_vec[1] you are not accessing an instance of coffeBean but an instance of std::vector because coffe_vec is an array of vectors. If you want to access coffeBean elements you need to call for example coffe_vec[1][0] which wouldn't be good in your case because all vectors in your array are empty.

Maybe you wanted to create a vector with 4 elements, that would look like that:

std::vector coffe_vec(4);

or use { }