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Tip of the Day
Language: C++
Expertise: Beginner
Nov 11, 1998

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A Static Member Function can Access Only Static Members

A static member function does not receive an implicit this argument. It can be invoked even when no object instance exists:
 
#include < ctime >
using namespace std;

class Clock {
public: 
  static time_t getTime ( ){ return time (0); }//seconds elapsed since 1/1/1970 
};

main() {
cout<<Clock::getTime(); //OK, no object instance required
}
For this reason, a static member function can access only static data members and static member functions of its class.
Danny Kalev
 
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