class B:public A2,public A1,public A3
//按照继承的顺序调用基类的构造函数
{ private:
A3 memberA3; A2 memberA2;
A1 memberA1; int z;
public:
B(int x,int y,int m,int n):
A1(x),A2(y),memberA1(m),memberA2(n)
{ z=x+y+m+n;
cout<<"B "<<z<<endl; }
};
void main()
{ B object(1,2,3,4); }
