#include
class B0
{
int nv;
public:
B0 (int n) {nv=n;cout<<"Member of B0"<<endl;}
void fun () {cout<<"fun of B0"<<endl;}
};
class B1:virtual public B0
{
int nv1;
public:
B1(int a):B0(a) {cout<<"Member of B1"<<endl;}
//B1(int a,int b):B0(a) {nv1=b; cout<<"Member of B1"<<endl;}
};
class B2:virtual public B0
{
int nv2;
public:
B2(int a):B0(a) {cout<<"Member of B2"<<endl;}
//B2(int a,int b):B0(a) {nv2=b; cout<<"Member of B2"<<endl;}
};
class D1:public B1,public B2
{
int nvd;
public:
D1(int a):Bo(a),B1(a),B2(a) {cout<<"Member of D1"<<endl;}
//B2(int a,int b,int c,int d):B0(a),B1(b),B2(c) {nvd=d; cout<<"Member of D1"<<endl;}
void fund() {cout<<"fund of D1"<<endl;}
//void fun() {cout<<"fun of D1"<<endl;}
};
void main ()
{ D1 d1(1);
d1.fund();
d1.fun();
}
程序运行到 ：
D1(int a):Bo(a),B1(a),B2(a) {cout<<"Member of D1"<<endl;}
时出现错误 ：
error C2512: 'B0::B0' : no appropriate default constructor available
该如何修改呢？
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