下面程序的结果是 #include＜iostream．h＞ class test{ private： int num； public： test( )； int getint( ) {return num；} ～test( )；}； test：：test( ) { num=0；} test：：～test( ) { cout＜＜"Destructor is active"＜＜endl；} void main( ) { test x[3]； cout＜＜"Exiting main"＜＜endl；}
A．Exiting main Destructor is active Destructor is active Destructor is active B．Exiting main Destructor is active Destructoris active C．Exiting main Destructoris active D．Exiting main