help needed with passing objects by reference

Im currently working hard on learning c++ and I would appreciate
any help with this problem.

I want this program to check if the rectangles area equals 100 and then take an action based on that check. I want to do the check in a separate function and have the function return 1 if it equals 100 and 0 if it doesn't. The "rectangle" class works fine with all other programs so that is not the problem.

Code:

---

#include <iostream>
#include <rectangle.h>

using namespace std;

int checkarea(rectangle *recta);

int main()
{
rectangle rect;
cout<<"The area is: "<<rect.GetArea()<<endl;
        if(checkarea(&rect)!=0);
        {
        return 0;
        }
cout<<"End of main()."<<endl;
return 0;
}

int checkarea (rectangle  *recta)
{
        if (recta->GetArea()==100)        //I didn' really know
        {                                                //if I should have used        cout<<"recta->GetArea() is 100."<<endl;  //the dot
        return 1;                                    //operator instead of ->
        }                                              //here.
cout<<"End of checkarea()."<<endl;
return 0;
}

---

By the way, this program isn't any serious one. I just wrote it to illustrate my problem.

Just a couple of things i spotted

Code:

---

if(checkarea(&rect) != 0);
{
  return 0;
}

---

Change this to

Code:

---

if((checkarea(&rect)) != 0)
{
  return 0;
}

---

And

Code:

---

if (recta->GetArea()==100)

---

to

Code:

---

if ((recta->GetArea()) == 100)

---

Apart from that it looks ok to me.

If you want to use references:

Code:

---

bool checkarea (rectangle & recta)
{
    if (recta.GetArea()==100)       
    {                                               
          cout << "recta.GetArea() is 100." << endl; 
          return true;                                 
    }                                             
    cout << "End of checkarea()." << endl;
    return false;
}

---

then use if ( checkarea (rect) == true ), etc.

Quote:

---

Code:

---

if(checkarea(&rect) != 0);
{
  return 0;
}

---

Change this to

Code:

---

if((checkarea(&rect)) != 0)
{
  return 0;
}

---

---

!!!!
What is the problem with :
if(checkarea(&rect) != 0)

this is just different stylistic approach
there is not any sintax error in this!