| Topic: |
DEVELOP > c-Plus-Plus |
| User: |
"JustSomeGuy" |
| Date: |
01 Dec 2004 07:53:08 PM |
| Object: |
Can't access a static private data member from a friend function? |
I have a class with a private data member and I want to access it
from a friend function, but Visual Studio 2003 .NET won't let me.
class MyClass
{
private:
static int level;
public:
friend ostream & operator<<(ostream & x, const MyClass & c);
}
int MyClass::level = 0;
ostream & operator<<(ostream & x, const MyClass & c)
{
O << c.level;
}
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| User: "Jonathan Turkanis" |
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| Title: Re: Can't access a static private data member from a friend function? |
01 Dec 2004 08:18:43 PM |
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"JustSomeGuy" <nope@nottelling.com> wrote in message
news:8Aurd.408074$%k.113318@pd7tw2no...
I have a class with a private data member and I want to access it
from a friend function, but Visual Studio 2003 .NET won't let me.
class MyClass
{
private:
static int level;
public:
friend ostream & operator<<(ostream & x, const MyClass & c);
}
int MyClass::level = 0;
ostream & operator<<(ostream & x, const MyClass & c)
{
O << c.level;
}
Post some code that has some hope of compiling. Among other things, you've
omitted the semicolon at the end of the definition of MyClass, you've used an
undeclared variable O in the implementation of operator<<, and the function
doesn't return a value.
Jonathan
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| User: "Sumit Rajan" |
|
| Title: Re: Can't access a static private data member from a friend function? |
01 Dec 2004 09:01:03 PM |
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JustSomeGuy wrote:
I have a class with a private data member and I want to access it
from a friend function, but Visual Studio 2003 .NET won't let me.
#include <iostream>
using namespace std;
class MyClass
{
private:
static int level;
public:
friend ostream & operator<<(ostream & x, const MyClass & c);
}
missing ;
int MyClass::level = 0;
ostream & operator<<(ostream & x, const MyClass & c)
{
O << c.level;
x << c.level; //or "x << MyClass::level;"
return x; // undefined behaviour if you forget to return x
}
Regards,
Sumit.
--
Sumit Rajan <sumit.rajan@gmail.com>
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| User: "Daniel Mitchell" |
|
| Title: Re: Can't access a static private data member from a friend function? |
05 Dec 2004 12:59:59 AM |
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JustSomeGuy wrote:
I have a class with a private data member and I want to access it
from a friend function, but Visual Studio 2003 .NET won't let me.
class MyClass
{
private:
static int level;
public:
friend ostream & operator<<(ostream & x, const MyClass & c);
}
int MyClass::level = 0;
ostream & operator<<(ostream & x, const MyClass & c)
{
O << c.level;
}
ostream& operator<<( ostream& x, const MyClass& c )
{ return x << c::level; }
.
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| User: "Daniel Mitchell" |
|
| Title: Re: Can't access a static private data member from a friend function? |
05 Dec 2004 01:06:59 AM |
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Daniel Mitchell wrote:
JustSomeGuy wrote:
I have a class with a private data member and I want to access it
from a friend function, but Visual Studio 2003 .NET won't let me.
class MyClass
{
private:
static int level;
public:
friend ostream & operator<<(ostream & x, const MyClass & c);
}
int MyClass::level = 0;
ostream & operator<<(ostream & x, const MyClass & c)
{
O << c.level;
}
ostream& operator<<( ostream& x, const MyClass& c )
{ return x << c::level; }
I'm retarded. Sorry for wasting everyones time.
.
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| User: "JustSomeGuy" |
|
| Title: Re: Can't access a static private data member from a friend function? |
05 Dec 2004 11:51:20 AM |
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"Daniel Mitchell" <danmitchell@mail.utexas.edu> wrote in message
news:couc38$rlj$1@geraldo.cc.utexas.edu...
Daniel Mitchell wrote:
JustSomeGuy wrote:
I have a class with a private data member and I want to access it
from a friend function, but Visual Studio 2003 .NET won't let me.
class MyClass
{
private:
static int level;
public:
friend ostream & operator<<(ostream & x, const MyClass & c);
}
int MyClass::level = 0;
ostream & operator<<(ostream & x, const MyClass & c)
{
O << c.level;
}
ostream& operator<<( ostream& x, const MyClass& c )
{ return x << c::level; }
I'm retarded. Sorry for wasting everyones time.
I doubt that... Thank you.
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