NetBeans Forums

FAQ

Memberlist

Profile

Help with a "has a" relationship

NetBeans Forums -> C/C++ Users

View previous topic :: View next topic

Author

Message

brb00136

Joined: 02 Dec 2011
Posts: 5

Posted: Thu Dec 22, 2011 6:06 am Post subject: Help with a "has a" relationship

Hi everyone, can someone help me with the loadInformation member function: I wrote the rest of this but cannot figure out how to populate the arrays for each of the variables....

Code:

#include <iostream>
#include <string>
#include <iomanip>
#include <cassert>
#include <cstdlib>

using namespace std;

//DVD Header file
class DVD {
public:

DVD();
void Print();
void LoadInformation();

float getCost()
{ return cost;
}

std::string getName()
{ return name;
}

Time getTime()
{ return length;
}

private:
std::string name;
float cost;

Time length;
};

// Time class definition
class Time
{
public:
Time(int=0, int=0, int=0); // constructor
void setTime( int, int, int ); // set hour, minute and second
void printUniversal(); // print time in universal-time format
void printStandard(); // print time in standard-time format
std::string toString(); // Return the Time object as a string

private:
int hour; // 0 - 23 (24-hour clock format)
int minute; // 0 - 59
int second; // 0 - 59
}; // end class Time

//DVD Implementation
DVD::DVD() : cost(0.0),
name("None")

{
}

//whats missing? Length- Time object

void DVD::LoadInformation() {

//needs a dvd pointer
//needs a for loop for inputing each -

// To do, populate the DVD from the user

}

//implemented print function for us this couts objects
void DVD::Print() {
std::cout << " Name : " << name << std::endl;
std::cout << " Cost : " << cost << std::endl;
std::cout << "Length : " << length.toString() << std::endl;
}

// Time constructor initializes each data member to zero.
// Ensures all Time objects start in a consistent state.

Time::Time(int h, int m, int s)
{
setTime(h, m, s);
} // end Time constructor

// set new Time value using universal time; ensure that
// the data remains consistent by setting invalid values to zero

void Time::setTime( int h, int m, int s )
{
hour = ( h >= 0 && h < 24 ) ? h : 0; // validate hour
minute = ( m >= 0 && m < 60 ) ? m : 0; // validate minute
second = ( s >= 0 && s < 60 ) ? s : 0; // validate second
} // end function setTime

// print Time in universal-time format (HH:MM:SS)

void Time::printUniversal()
{
cout << setfill( '0' ) << setw( 2 ) << hour << ":" << setw( 2 ) << minute << ":" << setw( 2 ) << second;
} // end function printUniversal

// print Time in standard-time format (HH:MM:SS AM or PM)
void Time::printStandard()
{
cout << ( ( hour == 0 || hour == 12 ) ? 12 : hour % 12 ) << ":"
<< setfill( '0' ) << setw( 2 ) << minute << ":" << setw( 2 )
<< second << ( hour < 12 ? " AM" : " PM" );
} // end function printStandard

// Return time values as a string to the caller
std::string Time::toString()
{
char buffer[32];
sprintf(buffer, "%02d:%02d:%02d", hour, minute, second);
// constructs a string that looks like hours minutes seconds
std::string theReturnedStr(buffer);

return theReturnedStr;
}

//MAIN
const int NUMDVDS = 1;

// Free function to loop over the array of dvd pointers to
// print each DVD.
void DisplayDVDs(DVD* dvdArr[]) {
for (int i = 0; i < NUMDVDS; i++)
dvdArr[i]->Print();
}

// To Do, add function to GetDVDsFromUser

// Main function to begin all processing.
int main() {
// Dynamically create the first DVD object
DVD* dvd1 = new DVD;
if (NULL == dvd1)
{
std::cerr << "Unable to create dvd1, aborting!" << std::endl;
}

DVD* dvd2 = new DVD;
if (NULL == dvd2)
{
std::cerr << "Unable to create dvd2, aborting!" << std::endl;
}

DVD* dvd3 = new DVD;
if (NULL == dvd3)
{
std::cerr << "Unable to create dvd2, aborting!" << std::endl;
}

// Populate the array of pointers
DVD* dvdArr[NUMDVDS];
dvdArr[0] = dvd1;
dvdArr[1] = dvd2;
dvdArr[2] = dvd3;

//hide cins in load information of dvd class- and have it loop
// Use the array of pointers to pass to free functions
DisplayDVDs(dvdArr);

//once thats done call diplay dvds takes an array of pointers, for each dvd- print yourself!
// Delete each indivual DVD, reclaiming its memory
delete [] dvdArr;

//delete dvdArr[0];
//delete dvdArr[1];
//delete dvdArr[2];

system("pause");
}

Display posts from previous:

	NetBeans Forums -> C/C++ Users	All times are GMT
Page 1 of 1

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum