currency.h

计算器 英国一个学生写的 代码很适合学习

//////////////////////////////////////////////////////////////////////
/*							  Currency.h							*/
/*				interface for the Currency class					*/
/*							  written by							*/
/*							Anwar-ul-Haque							*/
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_CURRENCY_H__66695518_488D_49BE_B85E_6EA77B8413D3__INCLUDED_)
#define AFX_CURRENCY_H__66695518_488D_49BE_B85E_6EA77B8413D3__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

//////////////////////////////////////////////////////////////////////
// Enumerated data definitions
//////////////////////////////////////////////////////////////////////
enum cname 
{ 
	America,		// US Dollar
	Australia,		// Australian Dollar
	England,		// Pound Sterling
	Europe,			// European Euro
	India,			// Indian Ruppee
	Japan,			// Japanese Yen
	Pakistan,		// Pakistani Ruppee
	Saudi_Arabia	// Saudi Riyal
};

//////////////////////////////////////////////////////////////////////
// Constant Values
//////////////////////////////////////////////////////////////////////
const WORD PRECISION = 3;					// precision of decimal values
const WORD MAX_COUNTRIES = 8;				// maximum countries
const cname DEFAULT_COUNTRY = Pakistan;		// Default Country
const double BASE_RATES[] = {	// Base currency rates from default country to others
	60.750,			// Pak Ruppee into US Dollar
	49.950,			// Pak Ruppee into Aus Dollar
	122.550,		// Pak Ruppee into Pound Sterling
	82.950,			// Pak Ruppee into Euro
	1.510,			// Pak Ruppee into Indian Ruppee
	0.519,			// Pak Ruppee into Japanese Yen
	1.000,			// Pak Ruppee into Pak Ruppee
	16.170			// Pak Ruppee into Saudi Riyal
};
const cname COUNTRIES[] = {	// For extracting countries using int selections in list box
	America, Australia, England, Europe, India, Japan, Pakistan, Saudi_Arabia };
const CString CURR_LETTERS[] = {	// For extracting countries from currency letters
	"US $", "Aus $", "