[prog] Re: C++
wolf
wolf at wolfrising.net
Sat Mar 13 09:43:53 EST 2004
would anyone happen to be able to figure out how to complete/fix this
and get it to work? : )
I've been up most of the night and I just can't seem to get a grasp of
how. or do I have
everything so out of order and messed up it's beyond hope? thanks : )
#include <iostream>
using namespace std;
class cd {
private:
char artist[30];
char title[50];
int yr;
char genre[10];
public:
cd(); // construct a new blank CD.
void getdata(void);
//void showdata(void); // probably show data and put data are
the same thing
// I sugest that you get rid of this.
void putdata(void);
};
//***********************
class cdlib {
int main()
{
cd rack[10]; // some place to keep 10 CDs
for(int i=0; i<10; i++)
{
rack[i] = new cd(); // create a new CD
rack[i].getdata(); // fill it with data
rack[i].putdata(); // print out the data to confirm its
right.
} // for
for(int i=0; i<10; i++)
{
rack[i].putdata(); // print out the data to confirm its right.
} // for
return 0;
} // main
};
//********
void getdata()
{
/* get the data from the user and write it down to a text file. use
cin */
cout << "Enter the Artist's Name: "<< endl;
cin.getline >> artist;
cout << "Enter the Compact Disk Title: " << endl;
cin.getline >> title;
cout << "Enter the Year the CD was recorded: "<< endl;
cin >> yr;
cout << "Enter the genre for this CD: " << endl;
cin.getline >> genre;
}
void putdata()
{
cout << artist << endl;
cout << title << endl;
cout << yr << endl;
cout << genre << endl;
}
>
> On Mar 13, 2004, at 1:28 AM, Warren Prasad wrote:
>
> >
> > No void means that they return nothing ... not even NULL
> > so the void returning func ends like
> >
> > getdata()
> > {
> > // body
> > return ;
> > }
> > For showdata you can use the global pointer fp to access the file
> > which u opened in the main function.
> >
> > use fread to read data from the file .... and run a loop for it with
> > the exit co! ndition being the EOF...
> >
> > If u want i can write the whole program for u..
> >
> >
> > regards,
> >
> >
> > wolf wrote:
> > Hello : )
> > Thank you for helping : )
> > Since getdata() and putdata() are of type void would the correct
> > response
> > between the braces be:
> >
> > getdata()
> > {
> > return getdata;
> > }
> >
> > I'm afraid I don't understand this bit at all:
> > > showdata()
> > > {
> > > // use loop with EOF
> > > // to extract data and display it
> > > }
> >
> > how to extract something from type void?
> > again thank you for helping : )
> >
> >
> > On Mar 13, 2004, at 12:40 AM, Warren Prasad wrote:
> >
> > >
> > > #include
> > > //not needed
> > > //using namespace std;
> > > FILE *fp;
> > > class cdlib
> > > {
> > > char artist[30];
> > > char title[50];
> > > int yr;
> > > char genre[10];
> > > public:
> > > void getdata();
> > > void showdata();
> > > void putdata();
> > > };
> > > int main()
> > > {
> > > char ch;
> > > fp = fopen("library.txt", "+rw");
> > > ch = 'y';
> > > while(ch == 'y')
> > > {
> > > getdata();
> > > cout << "do you want to enter more data (y/n) : ";
> > > cin >> ch;
> > > }
> > >
> > > cout << "do you want to view the data (y/n) : ";
> > > cin >> ch;
> > > if (ch == 'y')
> > > {
> > > showdata();
> > > }
> > > return 0;
> > > }
> > > void getdata()
> > > {
> > > // Input each data
> > > // donot use loop
> > > putdata()
> > > // use this to write the data into a file
> > > }
> > > showdata()
> > > {
> > > // use loop with EOF
> > > // to extract data and display it
> > > }
> > >
> > > !
> > >
> > >
> > >
> > > wolf wrote:
> > > Hi : )
> > >
> > > Pretty much the whole thing, I think I bit off more than I can chew
> > : )
> > > Last time I posted my
> > > question someone was nice enough to start the class for me, and
> I've
> > > been trying for
> > > about a week to figure out/follow along how classes work but this
> is
> > a
> > > pretty big jump
> > > from what I've tried before. Any advice, ideas, help is very much
> ! > > appreciated : ) I
> > > had finally figured out functions but this seems to be a whole new
> > game
> > > : )
> > >
> > > Thank you!
> > >
> > > On Mar 12, 2004, at 10:07 PM, Sue Stones wrote:
> > >
> > > > On Sat, 13 Mar 2004 01:24 pm, wolf wrote:
> > > >> Could anyone help me along with getting this to work? Here's the
> > > >> original question I'm trying
> > > >
> > > > G'day Wolf,
> > > > Can you be specific about what you are stuck on at the moment?!
> > > > sue
> > > >
> > > >
> > > >> to figure out:
> > > >>> w! rite a simple program to track an individual's cd library,
> the
> > > >>> program should permit the user to enter 10 cds. Each cd
> > > >>> should contain the following items: artist, album title, year
> and
> > > >>> genre. the program s! hould display all the cds in order
> > > >>> by artist. design a class and represent each album as an object
> > of
> > > >>> that class. provide the capability to store the data
> > > >>> in a text file and retrieve it again the next time the program
> is
> > > >>> run.
> > > >>
> > > >> #include
> > > >> using namespace std;
> > > >>
> > > >> class cdlib
> > > >>
> > > >> {
> > > >>
> > > >> char artist[30];
> > > >>
> > > >> char title[50];
> > > >>
> > > >> int yr;
> > > >>
> > > >> char genre[10];
> > > >>
> > > >>
> > > >>
> > > >> public:
> > > >>
> > > >> void getdata();
> > > >>
> > > >> void showdata();
> >! > >>
> > > >&g! t; void putdata();
> > > >>
> > > >> };
> > > >>
> > > >> int main()
> > > >> {
> > > >>
> > > >> int cd;
> > > >>
> > > >> /* get the data from the user and write it down to a text file.
> > use
> > > >> cin */
> > > >> while (cd < 10)
> > > >> {
> > > >> cout << "Enter the Artist's Name: "<< endl;
> > > >> cin >> artist;
> > > >> cout << "Enter the Compact Disk Title: " << endl;
> > > >> cin >> title;
> > > >> cout << "Enter the Year the CD was recorded: "<< endl;
> > > >> cin >> yr;
> > > >> cout << "Enter the ge! nre for this CD: " << endl;
> > > >> cin >> genre;
> > > >> }
> > > >>
> > > >> return 0;
> > > >> }
> > > >> /* to put data into the file fopen, fwrite */
> > > >>
> > > >> putdata()
> > > >>
> > > >>
> > > >> }
> > > >>
> > > >>
> > > >>
> > > >> getdata()
> > > >>
> > > >> {
> > > >>
> > > &g! t;> /* Read the data from the file fopen. fread */
> > > >> return data;
> > > >> }
> > > >>
> > > >> _______________________________________________
> > > >> Programming mailing list
> > > >> Programming at linuxchix.org
> > > >> http://mailman.linuxchix.org/mailman/listinfo/programming
> > > >
> > > > _______________________________________________
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> > > >
> > >
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> >
> >
> > Warren Bhusan Prasad.
> > (Software Enggineer)
> > Implementation and Support Team,
> > Jatayu Softwares,
> > Yehelanka, Bangalore.
> >
> > Phone (mobile) : +91 984 513 1255
> >
> > Do you Yahoo!?
> > Yahoo! Mail - More reliable, more storage, less spam
>
>
>
> Warren Bhusan Prasad.
> (Software Enggineer)
> Implementation and Support Team,
> Jatayu Softwares,
> Yehelanka, Bangalore.
>
> Phone (mobile) : +91 984 513 1255
>
> Do you Yahoo!?
> Yahoo! Mail - More reliable, more storage, less spam
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