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