//**************************************
// 
// Program Name : ConvDec.cpp 
// 
//     Programmer : Vagabond
//                        Beginner C++ 
//
//      Description : The user is asked to in
//      put a number in either Hex, Octal or
//      Decimal, which is then converted to Hex, 
//      Octal & Decimal. 
//      The user can exit the program from the
//      MAIN MENU or bythe Escape key after 
//      each convertion. 
//
//         Compiler : Borland Turbo C++ v4.5.
//              Date : 16/03/2006  
// 
//**************************************
  
#include <iostream.h>
#include <conio.h>
#include <stdlib.h> 

const int ESC = 27; 

int main()


    {
    	int key = 0;
    	int choise = 0;
    	long number;
    	while(key != ESC)


        	{
        		cout << "Choose Your Number Base\n";
        		cout << "\n\t1. Hexadecimal.";
        		cout << "\n\t2. Octal.";
        		cout << "\n\t3. Decimal.";
        		cout << "\n\t4. Exit.\n\t";
        		cin >> choise;
        		switch(choise)


            		{
            			case 1: clrscr();
            				        cout << "Enter a Hex number: ";
            				        cin >> hex >> number;
            					cout << "\n value in octal = "
            					<< oct << number << endl;
            					cout << " value in decimal = "
            					<< dec << number << endl;
            					break;
            			case 2: clrscr();
            					cout << "Enter a Octal number: ";
            					cin >> oct >> number;
            					cout << "\nvalue in hex = "
            					<< hex << number << endl;
            					cout << " value in decimal = "
            					<< dec << number << endl;
            					break;
            			case 3: clrscr();
            					cout << "Enter a dec number: ";
            					cin >> dec >> number;
            					cout << "\n value in octal = "
            					<< oct << number << endl;
            					cout << "value in hex = "
            					<< hex << number << endl;
            					break;
            			case 4: clrscr();
            					cout << "Program terminated by user...";
            					exit(0);
            					break; //Unreachable code.... 
            			default : clrscr();
            					cout << "ERROR ~ Invalid selection\n\n";
            					break;
            		}
            		cout << "Press any key to continue or 'Esc' to exit";
            		key = getche();
            		clrscr();
            	}
            	cout << "Program terminated by user...";
            	return 0;
        }

#include <iostream>

using namespace std;

#include <iostream>

using namespace std;