虚析构函数的必要性
#include"iostream"
using namespace std;
class base1{
public:
base1(){
cout << "父类构造函数" << endl;
}
~base1(){
cout << "父类的析构函数" << endl;
}
virtual void print(){
cout << "virtual base1.print();" << endl;
}
};
class derived1 :public base1{
int b;
public:
derived1(){
cout << "子类构造函数" << endl;
}
~derived1(){
cout << "子类的析构函数" << endl;
}
virtual void print(int a = 0){
cout << "virtual derived.print();" << endl;
}
};
void f(){
base1 *d=new derived1;
delete d;
}
int main(){
f();
system("pause");
return 0;
}
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