dcsimg
Login | Register   
LinkedIn
Google+
Twitter
RSS Feed
Download our iPhone app
TODAY'S HEADLINES  |   ARTICLE ARCHIVE  |   FORUMS  |   TIP BANK
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.


Tip of the Day
Language: C++
Expertise: Beginner
Dec 23, 1999

WEBINAR:

On-Demand

Building the Right Environment to Support AI, Machine Learning and Deep Learning


Ambiguous Operator Error

Question:
My small program (see below) below compiles and runs correctly on one machine and generates the following error on another:

'operator <<' is ambiguous

Both computers are running Windows NT 4 Service Pack 4, Microsoft Visual Studio C++ v.6.

Could you please tell me where the source of this problem could be?

Tools | Options | Directories Tab and
Tools | Options | Help System Tab of MS Visual C++ Studio have the same settings on both computers.

 
*/
#include 
#include 
#include 

using namespace std;

class Event{
   friend ostream &operator<<(ostream &, 
                              const Event & );
public:
   Event(int , int , int);
   bool operator<(const Event & ) const;
private:
   int eT;
   int pT;
   int type;
};

Event::Event(int e, int p, int t)
{
   eT=e;
   pT=p;
   type=t;
}

bool Event::operator<(const Event &e) const 
{
   if(eT pq;
   pq.push(e1);
   pq.push(e2);
   while(!pq.empty())
   {
      cout<
error C2248: 'eT' : cannot access private member declared in class
'Event'
see declaration of 'eT'
error C2248: 'pT' : cannot access private member declared in class
'Event'

Answer:
Your code is fine. The first release of VC++ 6 had several bugs with handling friend functions. These bugs were fixed in the VC++ Service Packs that came later. I recommend that you install the latest VC++ 6 Service Pack on the machine where the compilation errors occur. This should solve the problem.

DevX Pro
 
Comment and Contribute

 

 

 

 

 


(Maximum characters: 1200). You have 1200 characters left.

 

 

Sitemap
Thanks for your registration, follow us on our social networks to keep up-to-date