下面程序中错误之处是 ______。 #include＜iostream.h＞ class A private： int xl; protected: int x2; public: int x3; ; class B: public A private: int b1; protected: int b2; public: int b3; void disp()cout＜＜x1＜＜b2＜＜end1; A void set(int i)x3=i; B ; void main() B bb; bb. a3=10 C bb. b3=10 D
下面程序中错误之处是 ______。
#include＜iostream.h＞
class A
private：
int xl;
protected:
int x2;
public:
int x3;
;
class B: public A
private:
int b1;
protected:
int b2;
public:
int b3;
void disp()cout＜＜x1＜＜b2＜＜end1; //A
void set(int i)x3=i; //B
;
void main()
B bb;
bb. a3=10 //C
bb. b3=10 //D