C++类继承代码中Dog构造函数初始列表横线处填Animal(name)后程序的执行结果是？
class Animal {
public:
std::string name;
Animal(std::string str) : name(str) {
std::cout << "Animal created\n";
}
virtual void speak() {
cout << "Animal speaks" << endl;
}
};
class Dog : public Animal {
std::string breed;
public:
Dog(std::string name, std::string b) : ____________, breed(b) {
std::cout << "Dog created\n";
}
void speak() override {
std::cout << "Dog barks" << endl;
}
};
int main() {
Animal* p = new Dog("Rex", "Labrador");
p->speak();
delete p;
return 0;
}