/*
 **************************************************************************
 * Program name : 051_Arrays_of_pointer (Version 1.00)                    *
 * Author       : Duck Wong                                               *
 * Language     : C / C++                                                 *
 * Compiler     : Boodshed Dec-C++ compiler Ver 3.95                      *
 * Computer     : PII350                                                  *
 * O/S          : Windows 98                                              *
 **************************************************************************
 * Version 1.00 : 2000/07/01 - first version                              *
 **************************************************************************
 * Description  : (a) Input an integer number (0-5)                       *
 *                (b) Output an error message                             *
 *                (c) Output the memory address and elements of Values    *
 *                (d) Try again ?                                         *
 **************************************************************************
*/
#include <iostream.h>
#include <stdlib.h>

void Displaymessage(int);

int main()
{
 // part 1 : declaration
 int   Number;
 char  Again;

 do {
     // part 2 : Input an integer number (0-5)
     do {
         cout << "\n\nPlease input an integer number (0 - 5) : ";
         cin  >> Number;
        } while (Number<0 || Number>5);

     // part 3 : Output the message
     Displaymessage(Number);                                         // Note (1)

     // part 4 : try another number ?
     cout << "\n\n\tTry another number (Y/N) : ";
     cin  >> Again;
     cout << "\n";
    } while (Again=='Y' || Again=='y');
 cout << "\n" << endl;

 system("PAUSE");
 return 0;
}

void Displaymessage(int Number)
{
 static char *err[] = {"File not found","No record","Can not open file",
                       "Write-protect error","Disk Full","System halt"};
 cout << "\n\tError code (" << Number << ") : " << err[Number] << "\n\n";

 int Index;                                                          // Note (2)
 cout << "\n\t----------------------------------------------------"
      << "\n\tMemory Location" << "\tNo." << "\tMessage"
      << "\n\t----------------------------------------------------";
 for (Index=0; Index<=5; Index++)
 cout << "\n\t" << &err[Index] << "\t" << Index << "\t" << err[Index];
 cout << "\n\t----------------------------------------------------";
}

/* Notes
   (1)  The function returns or output a message given its code number.
        Example :

        Please input an integer number (0 - 5) : 3
        Error code (3) : Write-protect error

   (2)  Show all the messages and their memory locations
        Example :

        ----------------------------------------------------
        Memory Location No.     Message
        ----------------------------------------------------
        0x414008        0       File not found
        0x41400c        1       No record
        0x414010        2       Can not open file
        0x414014        3       Write-protect error
        0x414018        4       Disk Full
        0x41401c        5       System halt
        ----------------------------------------------------

*/