摘要：
class B;class A {public: A () { B* pb = new B; printf ("A()"); }; ~A () { printf ("~A()"); };};class B {public: B () { printf ("B()"); }; ~B () { printf ("~B()"); };};int main(int argc, char* argv[]){ printf("Hello World!\n"); return 0;}以上代码会报：error 阅读全文
