Algorithmic Problem Solving: Preparing for a Coding Interview/

...

/

C++ Rules For Classes And Numbers

C++ Rules For Classes And Numbers

Learn about good programming practices for C++ regarding classes, containers, integers, and floating point numbers.

We'll cover the following...

Classes

  • Differentiate between class and struct, though the only formal difference between them is whether fields are public by default or not. Use struct when you need a bunch of public fields with no non-trivial methods. Use class as a bunch of private fields with methods processing them. The following is an example of struct:
Press + to interact
struct Point {
    double x;
    double y;
};
bool operator < (const Point& first, const Point& second) {
    if (first.x != second.x) {
       return first.x < second.x;
    }
    return first.y < second.y;
}

Example of class:

Press + to interact
class Path {
public:
    Path(double time, double average_speed)
        : time_(time), average_speed_(average_speed)
    {}
    double Time() const {
        return time_;
    }
    double AverageSpeed() const {
        return average_speed_;
    }
    double Distance() const {
        return time_ * average_speed_;
    }
private:
    double time_;
    double average_speed_;
};

  • When you need to compare objects of your class or struct, just implement operator<, but don’t implement other operators for comparing (operator<=, operator>, operator>=). The reason is that the other comparing operators are implied by operator<. Following this convention will decrease code ...