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A (3D) cube has 2^3 = 8 vertices.
A (2D) square has 2^2 = 4 vertices.
A (1D) line segment has 2^1 = 2 vertices.
A (0D) point has 2^0 = 1 vertices - so the point is counted as a vertex?


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Verify your Java version.

In C++, that thing you use for newlines with cout is endl, not end1.

Main functions return an int, which is almost always 0. G++ adds in the return 0 automatically but develop the habit. ;P

Avoid system() calls if you are writing platform-independent code.

Suppose we have a variable called x. Consider the following algebra.

x = 5
x^2 = 25
x = x^(1/2)
x = +-5

So now we have to consider x being negative too as the act of taking a square-root in this kinda situation could render a negative answer too? Really Mr Additional Mathematics teacher? Well last I checked, in base 10, 5 != -5 so common sense needed in mathematical philosophications rendering the act of novelty generated through the tetration in terms of Euclid spacial dimensions, enough to radiate approximately the amount of electrons given from a particular quasi-stellular body of over 7,000,000.31 solar-masses equivalent to the ravenous black-hole radiation dependant on antimatter for existence in the first place, arising from the prospect of severity through spaghettification among other forces such as friction- C++.