overloading *, +, -'operators for vector class

Question

I\'m writing a Line class to make numerical methods and I want these operators (*, +, -) to make my code more readable and easier to understand.

Answer 1

You should never inherit from std-classes which are not meant for inheritance. Inheriting from classes which do not have a virtual destructor is very dangerous.

I'd suggest you use aggregation: Make your Line class contain a member of vector type, named myVector_ for example, and implement the desired operators in a way that they use this member variable.

So you replace all calls to size() to myVector.size() etc:

Line Line::operator*(double alfa)
{
    Vector temp;
    int n = myVector_.size();
    temp.resize(n);
    for (int i = 0; i < n; i++)
    {
        temp.at(i) = myVector_.at(i)*alfa;
    }
    return temp;
}