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.
We often want to show data in the form of a graph. The horizontal axis is labeled x-axis, a name which we often use for it. The vertical axis is labeled y-axis. We often label the variables which are plotted on the x-axis and y-axis x and y.