下面程序中错误之处是 ______。 include＜iostream.h＞ classA{private：intxl;protected:intx2;publ

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

}