( 29 )有如下程序: #include using namespace std class Part{ public: Part(int x=0):val(x) {cout$amp ~Part(){cout$amp private: int val } class Whole{ public: Whole(int x ,int y, int z=0):p2(x),p1(y),val(z){cout$amp ~Whole(){cout$amp private: Part p1,p2 int val } int main(){ Whole obj(1,2,3) return 0 } 程序的输出结果是