下列程序的执行结果是( )。 #include< iostream > using namespace std; class Test{ public: Test( ) { n += 2; } ~Test ( ) { n -= 3; } static int getNum( ) { return n; } private: static int n; }; int Test: :n = 1; int main( ) { Test * p = new Test; delete p; cout << “ n= “< return 0; }