#include <iostream>
using namespace std;
class CBase;
CBase *g_psCBase;
class CBase{public: CBase() { g_psCBase = this; }
virtual void print() { cout << __FUNCTION__ << endl; }};
class CTest : public CBase{public:
virtual void print() { cout << __FUNCTION__ << endl; }};
int main() {
CTest b; g_psCBase->print();
system("pause"); return 0; }
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