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

The linker error tells you that your code is missing definitions of two member functions that you declared - the constructor and the destructor:

Line::Line() {
    // Code of the constructor goes here
}

Line::~Line() {
    // Code of the destructor goes here
}