main.cpp

#include <cstdlib>
#include <iostream>
#include "circle.h"

using namespace std;

int main()
{
	char ch;

	int OptionNum;
	circle myCircle;

	do
	{
		cout << "_____________________________________________________" << endl;
		cout << "-----------------------------------------------------" << endl;
		cout << "            Option       |     Option Code #         " << endl;
		cout << "-----------------------------------------------------" << endl;
		cout << "            Circle       |           301             " << endl;
		cout << "           Rectangle     |           501             " << endl;
		cout << "           Triangle      |           701             " << endl;
		cout << "             Exit        |           101             " << endl;
		cout << "-----------------------------------------------------" << endl;
		cout << "Please enter your Option Code #: ";
			cin >> OptionNum;

			if (OptionNum == 301)
			{
				myCircle.setCircle(33);
			}
			else if (OptionNum == 501)
			{
				//Rectangle
			}
			else if (OptionNum == 701)
			{
				//Triangle
			}
			else if (OptionNum == 101)
			{
				break;
			}
	}
	while(1==1);





	cin >> ch;
}


circle.h

#include <iostream>
class circle
{
public:
    void setCircle(int Radius);

    void setCircle(double Radius);

};