下列程序的输出结果是______。 #include<iostream) using namespace Std; Class Test{ public: Test(){cnt++;} ~Test(){cnt--;} staticint Count(){return cnt;} private: static int cnt; }; int Test::cnt=0; int main() { cout<<Test::Count()<<‘‘; Test t1,t2; Test*pT3=new Test; Test*pT4=new Test; cout<<Test::Count()<<‘‘; delete pT4; delete pT3; cout<<Test::Count()<<endl; return 0; }