下面程序的输出是什么? #include using namespace std; class A{ public: A(int i) { a = i; cout< } ~A() { cout< } private: int a; }; class B{ public: B(int i) { b = i; cout< } ~B() { cout< } private: int b; }; class C:public B,public A{ public: C(int i):A(i),B(i) { cout< }; ~C() { cout< } }; int main() { C c(10); }