c++中的虛基類簡單示例

#include<iostream>

using namespace std;

class A {

protected:

int a;

public:

A(int a) :a(a) {};

};

class B : virtual public A {

protected:

int b;

public:

B(int a, int b) :A(a), b(b) {};

};

class C :virtual public A {

protected:

int c;

public:

C(int a, int c) :A(a), c(c) {};

};

class D :virtual public B, virtual public C {

protected:

int d;

public:

D(int a, int b, int c, int d) :A(a), B(a, b), C(a, c), d(d) {};

void display();

};

void D::display() {

cout << "a=" << a << endl;

cout << "b=" << b << endl;

cout << "c=" << c << endl;

cout << "d=" << d << endl;

}

int main() {

D* d = new D(1, 2, 3, 4);

d->display();

system("pause");

return 0;

}

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