The answer is actually four in all cases, since the construction of SomeDerivedClass
will cause the total to be incremented twice.
Here is a complete program (which I used to verify my answer):
#include <iostream>
#include <string>
using namespace std;
class SomeClass
{
public:
SomeClass() {total++;}
static int total;
void Print(string n) { cout << n << ".total = " << total << endl; }
};
int SomeClass::total = 0;
class SomeDerivedClass: public SomeClass
{
public:
SomeDerivedClass() {total++;}
};
int main(int argc, char ** argv)
{
SomeClass A;
SomeClass B;
SomeDerivedClass C;
A.Print("A");
B.Print("B");
C.Print("C");
return 0;
}
And the results:
A.total = 4
B.total = 4
C.total = 4