Concepts of classes and objects in C/C++

[attique63]

how could I write a program that will declare a class point. The class
point has two private data members x and y of type float. The class
point has a parameterized constructor to initialize both the data
members i.e. x and y. The class point has a member function display()
that display the value of x and y. Create two objects p1 and p2 with
your desired data and display the values of x and y of p1 and p2. Now
create a third object p3 by using the expression p3=p1+p2 and display
the values of x and y of p3

[Alf P. Steinbach]

* at*******@hotma il.com:

how could I write a program that will declare a class point. The class
point has two private data members x and y of type float. The class
point has a parameterized constructor to initialize both the data
members i.e. x and y. The class point has a member function display()
that display the value of x and y. Create two objects p1 and p2 with
your desired data and display the values of x and y of p1 and p2. Now
create a third object p3 by using the expression p3=p1+p2 and display
the values of x and y of p3

Make a better effort of conceiling the homework nature of your question,
please.

--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?

[Alf P. Steinbach]

* Alf P. Steinbach:

* at*******@hotma il.com:

>how could I write a program that will declare a class point. The class
point has two private data members x and y of type float. The class
point has a parameterized constructor to initialize both the data
members i.e. x and y. The class point has a member function display()
that display the value of x and y. Create two objects p1 and p2 with
your desired data and display the values of x and y of p1 and p2. Now
create a third object p3 by using the expression p3=p1+p2 and display
the values of x and y of p3

Make a better effort of conceiling the homework nature of your question,
please.

Then I promise to try at least once to make a better effort at speling.

--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?

[Phlip]

Just a note: There is no language "C/C++". We say that because, among the
C-style languages, C and C++ have very different usages and strategies.
Posters are advised to always get clear about which one they mean, before
posting, for best results!

ttique63 wrote:

how could I write a program that will declare a class point.

By writing a program with lots of X and Y variables, and lots of unit tests.
The refactor the program, passing all the tests after the fewest possible
edits, over and over again until all Xs and Ys have migrated into the exact
kind of Point class that this program needs.

No lie; that's the most sophisticated way to do it. If you start by guessing
your program needs such-and-so Point class, and if you write the class
first, you will burden your design with decisions made without feedback.

The class
point has two private data members x and y of type float. The class
point has a parameterized constructor to initialize both the data
members i.e. x and y. The class point has a member function display()
that display the value of x and y. Create two objects p1 and p2 with
your desired data and display the values of x and y of p1 and p2. Now
create a third object p3 by using the expression p3=p1+p2 and display
the values of x and y of p3

Oh, back up a minute. This is homework, right?

Read your tutorial, write your Point class first - exactly like your
professor told you to - and don't mention _anything_ I posted here.

Then when you have taken a crack at your Point class, post it here and we
will gleefully review it. Possibly with an eye towards keeping you out of
trouble, instead of in it.

Posting your raw homework assignment, as given, is kind'a tacky. ;-)

--
Phlip
http://c2.com/cgi/wiki?ZeekLand <-- NOT a blog!!!

[Robbie Hatley]

<at*******@hotm ail.comwrote in message news:11******** **************@ h48g2000cwc.goo glegroups.com.. .

how could I write a program that will declare a class point. The class
point has two private data members x and y of type float. The class
point has a parameterized constructor to initialize both the data
members i.e. x and y. The class point has a member function display()
that display the value of x and y. Create two objects p1 and p2 with
your desired data and display the values of x and y of p1 and p2. Now
create a third object p3 by using the expression p3=p1+p2 and display
the values of x and y of p3

Ummm... by reading about classes in your textbook, then putting
what you learn into practice? In the time you spent typing the
message quoted above, you could have been done with your homework
assignment already.

I'll give you one hint to get you going: declaring a class called
"Point" is going to involve writing "class Point". The syntax is
in your textbook. Read about "classes" there, please.

Once you've written your program, if it doesn't work, come back
here and copy-and-paste your program and ask for help. You'll find
that folks here are willing to help you with your homework. NOT do
it for you, though! HELP you. That means, you have to do most of
the work yourself. Get cracking.
--
Cheers,
Robbie Hatley
East Tustin, CA, USA
lone wolf intj at pac bell dot net
(put "[usenet]" in subject to bypass spam filter)
http://home.pacbell.net/earnur/

[tragomaskhalos]

Another tip when trying to get people to do your homework for you - try
to avoid using what is obviously the course module title as the subject
line !

[Frederick Gotham]

how could I write a program that will declare a class point. The class
point has two private data members x and y of type float. The class
point has a parameterized constructor to initialize both the data
members i.e. x and y. The class point has a member function display()
that display the value of x and y. Create two objects p1 and p2 with
your desired data and display the values of x and y of p1 and p2. Now
create a third object p3 by using the expression p3=p1+p2 and display
the values of x and y of p3

class Point : public {

private float x, y;

public Point(float,flo at) : { x(arg1), x(arg2) }

public void Display() volatile
{
puts(FLOATING,x ,y);
}

};
void main(int)
{
Point p1 = { 5.6,4.3 };
Point p2 = { 2.1,8.9 };

p1->Display(void );
p2->Display(void );

Point p3 = p1 + p2;

p3->Display(void );
}

--

Frederick Gotham

[Robbie Hatley]

"Frederick Gotham" <fg*******@SPAM .comwrote in message news:Tv******** ***********@new s.indigo.ie...

>

how could I write a program that will declare a class point. The class
point has two private data members x and y of type float. The class
point has a parameterized constructor to initialize both the data
members i.e. x and y. The class point has a member function display()
that display the value of x and y. Create two objects p1 and p2 with
your desired data and display the values of x and y of p1 and p2. Now
create a third object p3 by using the expression p3=p1+p2 and display
the values of x and y of p3

class Point : public {

private float x, y;

public Point(float,flo at) : { x(arg1), x(arg2) }

public void Display() volatile
{
puts(FLOATING,x ,y);
}

};
void main(int)
{
Point p1 = { 5.6,4.3 };
Point p2 = { 2.1,8.9 };

p1->Display(void );
p2->Display(void );

Point p3 = p1 + p2;

p3->Display(void );
}

--

Frederick Gotham

Tut-tut, my dear fellow; if you're going to do the OP's homework
for him, you should at least get him to slip you a ten spot. :-)

Two things I notice, though:

1. There's some errors in there. I'm assuming you put those
in there to force the OP to research the correct syntax for
himself, so I won't say what they are.
2. The subject line is all wrong, isn't it? Classes in C? No
such thing in C. Should read: "Concepts of classes and objects
in C++" People sure do like talking about that non-existant
language C/C++. (Actually, C/C++ would always be 1, regardless
of what's in C. But I digress.)

--
Cheers,
Robbie Hatley
East Tustin, CA, USA
lone wolf intj at pac bell dot net
(put "[usenet]" in subject to bypass spam filter)
http://home.pacbell.net/earnur/

[Daniel T.]

In article <11************ **********@h48g 2000cwc.googleg roups.com>,
at*******@hotma il.com wrote:

how could I write a program that will declare a class point. The class
point has two private data members x and y of type float. The class
point has a parameterized constructor to initialize both the data
members i.e. x and y. The class point has a member function display()
that display the value of x and y. Create two objects p1 and p2 with
your desired data and display the values of x and y of p1 and p2. Now
create a third object p3 by using the expression p3=p1+p2 and display
the values of x and y of p3

First declare a class called Point.

Then give it two private data members x and y of type float.

Then write a parameterized constructor that initializes both data
members (i.e. x and y.)

Then write a member function called "display()" that displays the value
of x and y.

Now (this is the tricky part) create a non-member function operator+
that accepts two Points as parameters and returns a Point. Have it add
the x's and y's of the two points passed in.

After you do all of the above, create two objects p1 and p2 with some
data (whatever you desire) and call display on them.

Then create a third object p3 by using the expression p3 = p1 + p2 and
call display on it.

[shadowman615]

at*******@hotma il.com wrote:

how could I write a program that will declare a class point. The class
point has two private data members x and y of type float. The class
point has a parameterized constructor to initialize both the data
members i.e. x and y. The class point has a member function display()
that display the value of x and y. Create two objects p1 and p2 with
your desired data and display the values of x and y of p1 and p2. Now
create a third object p3 by using the expression p3=p1+p2 and display
the values of x and y of p3

Did you even bother trying to figure any of this out? This reads as if
you simply copied your homework assignment instructions verbatim. It
couldn't be more clear what you have to do here -- you have precise
instructions about how to design your program, and what steps to
follow.

Why don't you take a stab at this and come back if you get stuck. But
don't post any more questions until you have some code written. Many
people here would be happy to help, but you need to do some of the
work.