//Allan Clark  Alyxpres.cpp//
//Oct 21/02//
//This program will calculate a bunch of numbers in 0.5 increments//

#include <iostream.h>				//The library call for input/output//
#include <stdlib.h>
#include <iomanip.h>				//The library call for input/output manipulation//
#include <conio.h>					//The library call for clrscr()//
#include <string.h>					//The library call used to manipulate string variables. (strcpy)//
#include <math.h>					//The library call to use math equations (sqrt) //
#include <time.h>  				//The library call to acquire the system's date//

int main(void)
	{
	char yes;   							// Declaration of Local Variables //
	do
	{
	double increment, refbegin, refend, sqrx, x, y;

												//Fowler Statement//
	cout << endl << endl;
	cout << "    ~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*" << endl;
	cout << "    ~This program will calculate a bunch of numbers in 0.5 increments*" << endl;
	cout << "    ~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*" << endl;
	cout << endl;

	cout << "                   // Allan Clark - Programmer //" << endl << endl;

	cout << "     Press Any Key to Continue";

	getch();                          // gets character //

	start:

	clrscr();								//Clears the fowler screen and goes to the input screen//

	time_t t=time(NULL);
	cout << "\t" << ctime(&t)<< endl << endl;	//Displays the time//

	cout << endl << endl;
	cout << "\t\tY Expression" << endl;
	cout << "\t\t~~~~~~~~~~~~" << endl;
	cout << endl;

	cout << "What is the beginning reference in the range of  (-.2.5 to 3.5): ";
	cin >> refbegin;
	cout << endl << endl;

	cout << "What is the ending reference in the range of     (-.2.5 to 3.5): ";
	cin >> refend;
	cout << endl << endl;

	clrscr();

	cout << "\t" << ctime(&t)<< endl << endl;	//Displays the time//

	cout << "     \t\t Functions and Relations" << endl;
	cout << "     \t\t ~~~~~~~~~~~~~~~~~~~~~~~" << endl << endl;

	cout << "      Value of 'X'  \t\ty = -2x^2 + 3x + 1 " << endl;
	cout << "      ~~~~~~~~~~~~  \t\t~~~~~~~~~~~~~~~~~~ " << endl;
	increment =  0.5;
	for(x = refbegin; x <= refend; x = x + increment)
		{
	sqrx = x * x;            						   // Squares 'X'
	y = (-2 * sqrx) + (3 * x) + 1;					// calculate the function values calculated by the expression
	cout << setiosflags(ios:: fixed | ios:: right);
	cout << setprecision(1);
	cout << setw(10) << x << setw(30) << y;
	getch();
	cout << endl;
		}
	cout << endl << "\t\t\t  !! * Thank You * !!" << endl << endl;
	cout << "\t Do you wish to make another report? (y/n): ";
	cin >> yes;
   }
   while(yes != 'n');
	if(yes != 'y')											// If statement that asks user if (s)he wants to make another report //
		{
		_exit(0);
      }
	}