classes confusion

[Trublu]

*/I believe I did a good job with constructing my program.
Please review and feel free to offer any guidelines or
tips as I am stuck. I am referring to my text for an
example program but I cannot seem to find one that fits.
Am I at least in the ballpark?*/

//Here's my problem...

*/Part a - Construct a class named Rectangle that has floating-point
data members named length and width. The class should have
a constructor that sets each data member to 0, member functions
named perimeter() and area() to calculate the perimeter and
area of a rectangle, respectively, a member function named
setdata() to set a rectangle's length and width, and a member
function named (showdata) that displays a rectangle's length,
width, perimeter, and area.
Part b. - Then include the Rectangle class
within a working C++ program.*/

//Part a.

#include <iostream.h>
#include <iomanip.h>

class Rectangle //class declaration

Private:
float length;
float width;

Public
Rectangle (float = 0, float = 0);
float perimeter();
float area ();
void setdata (float length, float width);
void showdata();
};

int main()
//Should I create rectangle objects and call methods here?
//Please provide an example
}

Perimter: (2 * length + 2 * width)
Area: (length * width)
setdata: //Not sure what goes here?
showdata: //I figure that here I should display length,
width, perimter, and area, then call perimeter and
area from in main?

//Part b.
//brainstorming
//create two objects and call at least one
//rectangle r1, r2, r3
//float temp = (result should be zero)
//length + width and give some values

I sent this e-mail for a kick start only. I am reading right now because maybe I missed something.

[Zach L.]

First, use code tags, it really helps to make the code readable. Next, remember that C++ is case-sensitive.

Here's a quick example to help get you started:

#include <iostream>

using namespace std;

class square
{
public:
    square() : side_(0) {}

    void setData(double x) { side_ = x; }
    double getArea() const { return side * side; }

    void print() const { cout << "Area: " << getArea() << endl; }
private:
    double side_;
};

int main()
{
    square a;
    a.setData(10);
    a.print();

    return 0;
}

That should help point you in the right direction. If you have an y more specific problems, let us know.