//  ;-----------------------------------------------------------
//  ; Program Name:   Class_Demo								
//  ; File:           Structest.cpp							
//  ; Description:    Demonstrates Structures 
//  ; Author:         Jim Adams								
//  ; Environment:    MS C++ 6.0								
//  ; Date Written:   07/13/2001
//  ;-----------------------------------------------------------
#include <iostream.h>
struct date
		{
		int		year;
		int		mon;
		int		day;
		};

struct book 
		{				// Structure Template
		char	title[30];
		char	author[25];
		int		quantity;
		float	cost;
		date	current_date;
		}  	library;	// Structure Variable

//	Prototypes
float calculate(float, int);
void get_input(float&, int&);

int main(void)
{
	get_input(library.cost, library.quantity);
	cout << calculate(library.cost, library.quantity) << endl;
	return(0);
}


//	Function to compute inventory cost
//	Passes two structure variables
//	Call by value
float calculate(float cost, int quan)
{
	return(quan * cost);
}



//	Function to get input variables
//	Passed structure variables but allows them to be changed
//	Call by reference
void get_input(float& c, int& q)
{
	cout << "Enter Book Quantity:";
	cin  >> q;
	cout << "Enter Book Cost:";
	cin  >> c;
}