#include <stdlib.h>
#include <iostream.h>
#include <iomanip.h>
#include "devconfx.h"
const double pi = 3.14, ft = 3.2808399, in = 39.3700787, fr = .555555555555, ce = 1.8;

void wait()
{
   gotoxy(25,24);
   cout << "Press any key to continue..." << flush;
   _getch();
}

void circles()
{
    double d1, d2, d3, d4, d5;
   clrscr();
   gotoxy(17,1);
   cout << "Radius to circumfrence, diameter and area.";
   gotoxy(17,3);
   cout <<"Input the radius of your circle here: ";
   cin >> d1;
   d2 = 2 * d1;
   gotoxy(17,4);
   cout << "The diameter of your circle is: " << d2;
   gotoxy(17,5);
   d3 = 2 * pi * d1;
   cout << "The circumfrence of your circle is: " << d3;
   gotoxy(15,6);
   d4 = pi * d1;
   d5 = d4 * d4;
   cout << "The area of your circle is: " << d5;
   wait();
}

void metricConversion()
{
    double d1, d2, d3;
   clrscr();
   gotoxy(17,1);
   cout << "This is metric conversion.";
   gotoxy(17,3);
   cout << "Enter your length in Meters: ";
   cin >> d1;
   gotoxy(17,4);
   d2 = d1 * ft;
   cout << "Your length in feet: " << d2;
   gotoxy(17,5);
   d3 = d1 * in;
   cout << "Your length in inches: " << d3;
   wait();
}

void fToCconversion()
{
    double d1, d2, d3;
   clrscr();
   gotoxy(17,1);
   cout << "This is Fahrenheit to Celsius conversion." << endl;
   gotoxy(17,3);
   cout << "Enter your degrees in Fahrenheit: ";
   cin >> d1;
   gotoxy(17,4);
   d2 = d1 - 32;
   d3 = d2 * fr;
   cout << "Your value in Celsius: " << d3;
   wait();
}

void cToFconversion()
{
    double d1, d2, d3;
   clrscr();
   gotoxy(17,1);
   cout << "This is Celsius to Fahrenheit conversion." << endl;
   gotoxy(17,3);
   cout << "Enter your degrees in Celsius: ";
   cin >> d1;
   gotoxy(17,4);
   d2 = d1 * ce;
   d3 = d2 + 32;
   cout << "Your value in Fahrenheit: " << d3;
   wait();
}

char menu()
{
   char ch;
   clrscr();
   gotoxy(15,3);
   cout <<"Your choices are:"<< endl;

   gotoxy(25,5);
   cout <<"1 - Radius to circumfrence & area of the circle."<< endl;
   gotoxy(25,6);
   cout <<"2 - Metric Conversion."<< endl;
   gotoxy(25,7);
   cout <<"3 - Fahrenheit to Celsius conversion"<< endl;
   gotoxy(25,8);
   cout <<"4 - Celsius to Fahrenheit conversion."<< endl;
   gotoxy(25,9);
   cout <<"Q - Closes program or brings you back to the menu."<< endl;
   
   ch = toupper(getch());
   return ch;
}

void process(char ch)
{
   if (ch == '1')
      circles();
   else if (ch == '2')
      metricConversion();
   else if (ch == '3')
      fToCconversion();
   else if (ch == '4')
      cToFconversion();
}

int main()
{
   char ch;
   initscreen();
   settitlebar("IPO1 - Nick Acton");
   textcolor(fgBlack);
   textbackground(bgWhite);
   clrscr();
   ch = menu();
   while (ch != 'Q')
   {
      process(ch);
      ch = menu();
   }
   uninitscreen();
   return 0;
}