Scoped and Unscoped Enumerations

enumerations.cpp

// Scoped and Unscoped Enumerations

#include <iostream>
#include <array>
#include <string_view> // C++ 17

enum EShape
{
	eCircle,
	eSquare,
	eTriangle,
	eRectangle,
	ePentagon,
	eHexagon,
	eSeptagon,
	eOctagon,
	eNonagon,
	eDecagon
};
enum class ECShape
{
	eCircle,
	eSquare,
	eTriangle,
	eRectangle,
	ePentagon,
	eHexagon,
	eSeptagon,
	eOctagon,
	eNonagon,
	eDecagon
};

void showNumber(int);
void showNumber(ECShape);
void print(int);
std::string_view getName(int);
std::string_view getName(ECShape);

int main()
{	
	EShape shape = eCircle;
	ECShape cShape = ECShape::eCircle;

	showNumber(shape);
	showNumber(cShape);
	showNumber(eTriangle);
	showNumber(ECShape::eHexagon);

	auto shapeName1 = getName(eOctagon);
	auto shapeName2 = getName(ECShape::ePentagon);

	std::cout << "Shape 1 is " << shapeName1 << " while Shape 2 is " << shapeName2 << ".\n";

	std::cin.get();
}

static std::string_view leftText = "Shape is number ";
static std::string_view rightText = " on the list.\n";

static std::array<std::string_view, 10> scShapes {
	"Circle",
	"Square",
	"Triangle",
	"Rectangle",
	"Pentagon",
	"Hexagon",
	"Septagon",
	"Octagon",
	"Nonagon",
	"Decagon"
};

// Displays a message with the value of the enumerator; integer type input
void showNumber(int val)
{
	print(val);
}

// Displays a message with the value of the enumerator; ECShape type input
void showNumber(ECShape val)
{
	print(static_cast<int>(val));
}

// Prints the mesage
void print(int p)
{
	std::cout << leftText << p << rightText;
}

// Returns the name of a shape for a given enumerator; integer input type
std::string_view getName(int eShape)
{
	return scShapes.at(eShape);
}

// Returns the name of a shape for a given enumerator; ECShape input type
std::string_view getName(ECShape eShape)
{
	return scShapes.at(static_cast<int>(eShape));
}

Thanks to @BiCapitalization for the tip on string_view.