[程序]
#include
class A{
public:
A(char *s){cout<
A(){ };
};
class B:public A{ //L1
public:
B(char *s1,char *s2):A(s1)
{ cout<
};
class C : public A{ //L2
public:
C(char *s1,char *s2):A(s1)
{ cout<
};
class D:public B,public C{
public:
D(char *s1,char *s2,char *s3,char *s4):B(s1,s2),C(s1,s3)
{ cout<
};
void main(void)
{
D *ptr= new D("students","study","C++","hard");
delete ptr;
}
执行程序后共输出___(1)___行.
若分别将L1行改为;class B : virtual public A{ //L1
L2行改为:class C:virtual public A{ //L2
则执行程序后共输出___(2)___行。