Which is the correct output of the following program.
#include <iostream>
#include <string>
using namespace std;
class ObjectCount{
private:
static int objCount;
public:
ObjectCount() { objCount++; }
static void print(const string& msg = "") {
if(msg.size() != 0) cout << msg << ": ";
cout << "objCount = " << objCount << endl;
}
~ObjectCount() { objCount--; }
};
int ObjectCount::objCount = 0;
ObjectCount f(ObjectCount oc) {
return oc;
}
int main(){
ObjectCount o1;
ObjectCount::print("after construction of o1");
ObjectCount o2 = f(o1);
ObjectCount::print("after call f()");
} 
