Let's consider a code example showing what would be allowed (or not) using different levels of inheritance: 1  class BaseClass {}; void freeStandingFunction(BaseClass* b); class DerivedProtected : protected BaseClass { DerivedProtected() { freeStandingFunction(this); // Allowed } };
Definition of Horizontal Axis. Horizontal means flat or level. Horizontal axis is the x-axis on a graph. The blue number line in the figure below is the x-axis, the horizontal axis.
The horizontal line is usually called the x axis, whereas the vertical line is called the y axis. The point that determines the location in which these two lines intersect each other is called the origin. The number, which is associated with the sought-for point, is usually called the coordinate of the point.