下列程序的输出结果是【 】。 include using namespace std; class Base{ public: int m,n; Base(int i,int j):m(i),n(j){} }; class Derived:public Base{ public: int m,k,; Derived(int i,int j):Base(i,j),m(i+1),k(j+1){} }; int main(){ Derived d(1,5); cout$amp; return 0; }