#include using namespace std; ? class cat{ ??public: ????cat() ????{ ??????numOfCats++; ????} ????static int getNumOfCats() ????{ ??????return numOfCats; ????} ????~cat() ????{ ??????numOfCats--; ????} ??private: ????static int numOfCats; }; int cat::numOfCats = 0;?//類的靜態(tài)成員變量必須在類外進行初始化 ? void numprintf() { cout<<"There are "<