Mega Code Archive
A static member functions
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#include <iostream>
using namespace std;
class MyClass {
static int count;
public:
MyClass() {
count++;
cout << "Constructing object " <<
count << endl;
}
~MyClass() {
cout << "Destroying object " <<
count << endl;
count--;
}
static int numObjects() { return count; }
};
int MyClass::count;
int main() {
MyClass a, b, c;
cout << "There are now " << MyClass::numObjects() << " in existence.\n\n";
MyClass *p = new MyClass();
cout << "there are now " << MyClass::numObjects() << " in existence.\n\n";
delete p;
cout << " there are now " << a.numObjects() << " in existence.\n\n";
return 0;
}
Constructing object 1
Constructing object 2
Constructing object 3
There are now 3 in existence.
Constructing object 4
there are now 4 in existence.
Destroying object 4
there are now 3 in existence.
Destroying object 3
Destroying object 2
Destroying object 1
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