/*

Copyright: 2000, All rights reserved.
Program: Strings Switch 
Version: 1.1
Created/Revised: 
File: stringswitch.cpp
Programmer: C. S. Tritt, Ph.D.
Course: CS-150
Assignment: STL Strings and Switch Construct Example
Compiler: Microsoft Visual C++ 6.0
Target: Win32

Description:

  This program demonstrates the use of C++ STL strings and
  the switch construct.

  The problem solved involves asking the user
  for a size code (L+, L, M, S and S-) and displying the
  corresponding text (Extra large, Large, Medium, Small
  and Extra small, respectively.

  This program uses a somewhat odd approach for demonstration
  purposes. It does not do complete error checking.

Revisions:

  There have been no major revisions of this program.

Constants and Variables:

  See code for constant and variable descriptions.

*/

// Included files.

#include <iostream>
#include <string>

// Macros for ANSI C++ logical operations in MSVC++ 6.0.

#define and &&
#define or ||
#define not !

using namespace std;

int main()
{

	// Define constants.

   const char LARGE = 'L';
   const char MEDIUM = 'M';
   const char SMALL = 'S';

   // Get input.

   cout << "Please enter a size code: ";
   string scode;
   cin >> scode;

   // Process input.

   cout << "Size: ";
   if (scode.length() > 2)
   {
      cout << "Invalid code: too many letters\n";
      return 1;
   }
   else
   {

      switch (scode[0]) // The string [] operator returns a char for use in the switch.
      {
         case LARGE:
            if (scode.length() == 1) cout << "Large";
            else if (scode.length() == 2)
               if (scode[1] == '+')
                  cout << "Extra large";
               else
               {
                  cout << "Invalid code: expecting \"+\"\n";
                  return 2;
               }
            break;
         case MEDIUM:
            cout << "Medium";
            break;
         case SMALL:
            if (scode.length() == 1) cout << "Small";
            else if (scode.length() == 2)
               if (scode[1] == '-')
                  cout << "Extra small";
               else
               {
                  cout << "Invalid code: expecting \"-\"\n";
                  return 3;
               }
            break;
         default:
            cout << "Invalid code.\n";
            return 4;
      }
   }
   cout << '\n';

   
   // Everything worked.

	return 0;
}