illegel indirecion

[MiKy]

I am getting this error:
Illegal indirection at line : a[*count_circle].SetArea(p1);
Is it possible to set an object in an array like I am trying to do ?

void CreateCircle(Circle* a, int count_circle)
{
float x,y,c, z;

cout<<" Enter the Center Point of the circle, X-Axis: " ;
cin>> x ;

cout<<endl;
cout<<" Enter the Center Point of the circle, Y-Axis: " ;
cin>> y ;
cout<<" Enter the Color of that point: " ;
cin>> c ;

cout<<" Enter the radius of the circle: " ;
cin>> z;
cout<<endl;

Circle p1( (x,y,c),z);
a[*count_circle].SetArea(p1);
}
my class circle:

class Circle: public Shape
{
public:
Circle(){};
Circle(Point p, float r) : Shape(p) {radius = r;
cout<<"radius :" << radius; }

void SetArea(Circle) {area= PI * ( pow(radius,2) ); }
float GetArea(){ return area; }

private:
float radius;
float area;

};

[Pete C.]

MiKy wrote:

I am getting this error:
Illegal indirection at line : a[*count_circle].SetArea(p1);
Is it possible to set an object in an array like I am trying to do ?

void CreateCircle(Circle* a, int count_circle) <snip> a[*count_circle].SetArea(p1);
}

<snip>

count_circle is not a pointer, so you can't dereference it.

- Pete

[Dan]

"MiKy" <XY*@bam.com> wrote in message
news:pM**************@news20.bellglobal.com...

I am getting this error:
Illegal indirection at line : a[*count_circle].SetArea(p1);
Is it possible to set an object in an array like I am trying to do ?

void CreateCircle(Circle* a, int count_circle)
{
float x,y,c, z;

cout<<" Enter the Center Point of the circle, X-Axis: " ;
cin>> x ;

cout<<endl;
cout<<" Enter the Center Point of the circle, Y-Axis: " ;
cin>> y ;
cout<<" Enter the Color of that point: " ;
cin>> c ;

cout<<" Enter the radius of the circle: " ;
cin>> z;
cout<<endl;

Circle p1( (x,y,c),z);
a[*count_circle].SetArea(p1);
}
my class circle:

class Circle: public Shape
{
public:
Circle(){};
Circle(Point p, float r) : Shape(p) {radius = r;
cout<<"radius :" << radius; }

void SetArea(Circle) {area= PI * ( pow(radius,2) ); }
float GetArea(){ return area; }

private:
float radius;
float area;

Sorry my brother played around with my account. Its me Dan asking this
question.

.... a better program from the past couple of days ago.

[markspace]

MiKy wrote:

I am getting this error:
Illegal indirection at line : a[*count_circle].SetArea(p1);
Is it possible to set an object in an array like I am trying to do ?

void CreateCircle(Circle* a, int count_circle)
How is a an array? CreateCircle(Circle a[], ... )
{
float x,y,c, z;

cout<<" Enter the Center Point of the circle, X-Axis: " ;
cin>> x ;

cout<<endl;
cout<<" Enter the Center Point of the circle, Y-Axis: " ;
cin>> y ;
cout<<" Enter the Color of that point: " ;
cin>> c ;

cout<<" Enter the radius of the circle: " ;
cin>> z;
cout<<endl;

Circle p1( (x,y,c),z);
a[*count_circle].SetArea(p1);
}
my class circle:

class Circle: public Shape
{
public:
Circle(){};
Circle(Point p, float r) : Shape(p) {radius = r;
cout<<"radius :" << radius; }

void SetArea(Circle) {area= PI * ( pow(radius,2) ); }
float GetArea(){ return area; }

private:
float radius;
float area;

};

[John Harrison]

"markspace" <ma*********@hotmail.com> wrote in message
news:10*************@corp.supernews.com...

MiKy wrote:

I am getting this error:
Illegal indirection at line : a[*count_circle].SetArea(p1);
Is it possible to set an object in an array like I am trying to do ?

void CreateCircle(Circle* a, int count_circle)

How is a an array? CreateCircle(Circle a[], ... )

a is not an array in your code either. In a function parameter 'Circle a[]'
is exactly the same as 'Circle *a'. Arrays cannot be parameters in C or C++.

john

[JKop]

MiKy posted:

I am getting this error:
Illegal indirection at line : a[*count_circle].SetArea(p1);
Is it possible to set an object in an array like I am trying to do ?

void CreateCircle(Circle* a, int count_circle)
{
float x,y,c, z;

cout<<" Enter the Center Point of the circle, X-Axis: " ;
cin>> x ;

cout<<endl;
cout<<" Enter the Center Point of the circle, Y-Axis: " ;
cin>> y ;
cout<<" Enter the Color of that point: " ;
cin>> c ;

cout<<" Enter the radius of the circle: " ;
cin>> z;
cout<<endl;

Circle p1( (x,y,c),z);
a[*count_circle].SetArea(p1);
}

I can only presume that a points to the start of an array of Circle*. If
so, replace:

a[*count_circle].SetArea(p1);

with

a[count_circle]->SetArea(p1);

or even:

*(a[count_circle]).SetArea(p1);

If a points to an array of Circle,
a[count_circle].SetArea(p1);

-JKop


-JKop

[Karl Heinz Buchegger]

JKop wrote:

MiKy posted:

I am getting this error:
Illegal indirection at line : a[*count_circle].SetArea(p1);
Is it possible to set an object in an array like I am trying to do ?

void CreateCircle(Circle* a, int count_circle)
{
float x,y,c, z;

cout<<" Enter the Center Point of the circle, X-Axis: " ;
cin>> x ;

cout<<endl;
cout<<" Enter the Center Point of the circle, Y-Axis: " ;
cin>> y ;
cout<<" Enter the Color of that point: " ;
cin>> c ;

cout<<" Enter the radius of the circle: " ;
cin>> z;
cout<<endl;

Circle p1( (x,y,c),z);
a[*count_circle].SetArea(p1);
}

I can only presume that a points to the start of an array of Circle*.

.... then the first argument to this function would be of type Circle**.
Since it is not you can deduce that a does not point to the start of an array
of Circle*
--
Karl Heinz Buchegger
kb******@gascad.at

[Ron Samuel Klatchko]

Karl Heinz Buchegger <kb******@gascad.at> wrote in message news:<40***************@gascad.at>...

JKop wrote:

MiKy posted:

I am getting this error:
Illegal indirection at line : a[*count_circle].SetArea(p1);
Is it possible to set an object in an array like I am trying to do ?

void CreateCircle(Circle* a, int count_circle)
{

I can only presume that a points to the start of an array of Circle*.

... then the first argument to this function would be of type Circle**.
Since it is not you can deduce that a does not point to the start of an array
of Circle*

A Circle* can most definitely point to an array of Circles. A Circle**
will actually point to an array of pointers to circles. Since you have
an array of pointers, you can then actually have any object derived from
Circle to enable you to get polymorphic behaviour.

But if all you have are actual circles, an array of actual instances of
Circles would be represented by Circle*.

samuel