//---------------------------------------------------------
//	프로그램:	직원 급여 주단위 계산 프로그램
//  날    짜:	2004-9-21
//	파	  일:	cash.cpp

//	함    수:
//  설    명:	급여를 계산해 내자.

//	저    자:	김진수
//  환    경:	p2.4c ram 1g winxp bcc5.5

//  기    타:
//  수    정:
//---------------------------------------------------------
#include <iostream.h>
#include <conio.h>

#define Continue	(SelNum=Display(EmpNum)) != 3
#define Success		(tempEmp = EmpInput()).EmpID != NULL

#define ID		1
#define Hours	2
#define Wage	3
#define TaxRate 4

struct DataEmp
{
	short EmpID;
	short EmpWorkHours;
	short EmpWage;
	short EmpTaxRate;
}; // Employee를 저장하기 위한 구조체

short Display(short);
void Display(DataEmp *,short);
DataEmp EmpInput();
short GetValue(short);
void Prompt(short);

void main()
{
	short EmpNum = 0,SelNum;
	DataEmp *Employee = NULL,*temp = NULL,tempEmp;
	
	while(Continue) // 3은 프로그램 종료
	{
		switch(SelNum)
		{
			case 1	: if(Success)
					  // 입력받아서 넘어온 Employee 구조체에서 ID가 NULL 이 아니라면
					  // 즉 데이터를 가지고 있다면 
					  {
						  EmpNum++;
						  cout << "\n      New Employee saved" ;

						  temp = (DataEmp *)malloc((EmpNum-1)*sizeof(DataEmp));
						  if((EmpNum-1) != 0)
						  {
							  for(int i=0 ;i<EmpNum-1;i++)
								  temp[i] = Employee[i];						  
						  }
					  
						  Employee = (DataEmp *)malloc(EmpNum*sizeof(DataEmp));
						  for(int i=0 ; i<EmpNum-1 ; i++)
						  {
							  Employee[i] = temp[i];
						  }
						  Employee[EmpNum-1] = tempEmp;
						  // Employee가 새로인 입력될때마다 그 크기에 맞게 새로이 메모리 할당을 한다.
					  }
					  else
						  cout << "\n      New Employee failed to save";
					  break;
			case 2	: 
					  break;
			case 3	: 
					  break;
			case 4	: Display(Employee,EmpNum);
					  break;
			default : break;
		}
	}

	getch();
}
//---------------------------------------------------------
short Display(short num)
{
	short SelNum;

	cout << "\n\n**입력된 직원수 : " << num << endl;
	cout << "\n1. New   Employee Input" << endl;
	cout << "2. Each  Employee Result Display" << endl;
	cout << "3. Total Employee Result Display & Exit" << endl;
	cout << ">> ";

	cin >> SelNum;

	return (SelNum);
}
//---------------------------------------------------------
DataEmp EmpInput()
{
	DataEmp RetData;
	short Num;

	RetData.EmpID			= GetValue(ID);
	RetData.EmpWorkHours	= GetValue(Hours);
	RetData.EmpWage			= GetValue(Wage);
	RetData.EmpTaxRate		= GetValue(TaxRate);

	return (RetData);
}
//---------------------------------------------------------
short GetValue(short num)
{
	short RetNum;

	Prompt(num);
	cin >> RetNum;

	return(RetNum);
}
//---------------------------------------------------------
void Prompt(short num)
{
	switch(num)
	{
		case ID	:	cout << "Enter Employee ID Number" << "\n>> ";
					break;
		case Hours :cout << "Enter Employee work hours" << "\n>> ";
					break;
		case Wage : cout << "Enter Employee wage rate" << "\n>> ";
					break;
		case TaxRate : cout << "Enter Employee tax rate" << "\n>> ";
					break;
	}
}
//---------------------------------------------------------
void Display(DataEmp *List,short num)
{
	for(int i=0 ; i<num ; i++)
	{
		cout << List[i].ID << endl;
	}
}
//---------------------------------------------------------