阅读程序，请写出这些程序的运行结果 （1）阅读程序，写出执行结果
#include <iostream> using namespace std; class Data { public: Data(int i):x(i){cout<<"A";} ~Data(){ cout<<"B";} private: int x; }; class Base { public: Base(int i):b1(i){cout<<"C";} ~Base(){ cout<<"D";} private: int b1; }; class Derived:public Base { public: Derived (int i,int j):Base(i),d1(j){ cout<<"E"; } ~Derived(){cout<<"F";} private: Data d1; }; int main() { Derived obj(1,2); return 0; }（2）阅读程序，写出执行结果
#include <iostream> using namespace std; class A { public: A(){a=0;} A (int i){a=i;} void print(){cout<<a<<" ";} private: int a; }; class B: public A { public: B(){b=0;} B(int i, int j, int k): A(i),aa(j){b=k;} //思考：这3处出现的print，有何区别 void print() //(1) { A::print(); //(2) aa.print(); //(3) cout<<b<<endl; } private: int b; A aa; }; int main() { B test[2]; test[0]=B(1,4,7); test[1]=B(2,5,8); for(int i=0; i<2; i++) test[i].print(); return 0; }（3）阅读程序，写出执行结果
#include <iostream> using namespace std; class A { public: A(char *s){cout<<s<<endl;} }; class B:public A { public: B(char *s1, char *s2):A(s1){ cout<<s2<<endl; } }; class C:public A { public: C(char *s1,char *s2):A(s1){ cout<<s2<<endl; } }; class D:public B, C { public: D(char *s1,char *s2,char *s3,char *s4): B(s1,s2),C(s3,s4){cout<<s4<<endl;} }; int main() { D d("class A","class B","class C","class D"); return 0; }（4）阅读程序，写出执行结果
#include <iostream> using namespace std; class Base { public: Base(char i) { cout<<"Base constructor. --"<<i<<endl; } }; class Derived1:virtual public Base { public: Derived1(char i,char j):Base(i){ cout<<"Derived1 constructor. --"<<j<<endl; } }; class Derived2:virtual public Base { public: Derived2(char i,char j):Base(i){ cout<<"Derived2 constructor. --"<<j<<endl; } }; class MyDerived: public Derived1,public Derived2 { public: MyDerived(char i,char j,char k,char l,char m,char n,char x): Derived2(i,j), Derived1(k,l), Base(m), d(n){ cout<<"MyDerived constructor. --"<<x<<endl; } private: Base d; }; int main() { MyDerived obj('A','B','C','D','E','F','G'); return 0; }（5）阅读下面类的定义，请说出在测试函数中不同情况的调用产生的结果
#include <iostream> using namespace std; class A { protected: int a,b; public: A(int aa, int bb):a(aa), b(bb) {} void printA(){ cout<<"a: "<<a<<"\tb: "<<b<<endl; } }; class B: public A { int c; public: B(int aa, int bb, int cc):A(aa,bb),c(cc) {} void printB() { cout<<"a: "<<a<<"\tb: "<<b<<"\tc: "<<c<<endl; } }; int main() { A a(1,1); B b(2,3,4); //此处加入下面各小题中的代码 return 0; }（a）
a=b; a.printA(); b.printA(); b.printB();你认为输出结果是：____________ 运行程序的结果是：____________ （b）
b=a; a.printA(); b.printA(); b.printB();程序会发生编译错误，原因是：____ 记录下IDE中提示的错误并理解：___ （c）
A &r1=a; A &r2=b; r1.printA(); r2.printA(); r2.printB();将会发生错误的一行删除； 对余下的程序，你认为输出是：____ 实际运行的输出是：__________ 那一行的错误原因是：________ （d）
A *p=&a; p->printA(); p=&b; p->printA(); p->printB();将会发生错误的一行删除； 对余下的程序，你认为输出是：____ 实际运行的输出是：__________ 那一行的错误原因是：________ （e） 在class A中增加成员函数：int getA(){return a;} 在main函数前增加一般函数：
void f(A x) { cout<<"aaaaah, my a: "<<x.getA()<<endl; }main函数中指定部分为：
f(a); f(b);你认为输出结果是：____________ 运行程序的结果是：____________
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