c++ 基类与派生类的构造函数

基类与派生的构造函数的调用顺序。创建时先基类后派生类。销毁时先派生类后基类。

当有参数时，参数必须传送给基类。注意例子中传递的方法。

#include <iostream>
#include <string>
using namespace std;

class CBase {
string name;
public:
    CBase(string s) : name(s) {
        cout << "BASE: " << name << endl;
    }
~CBase() {
        cout << "~BASE" << endl;
    }
};

class CDerive : public CBase {
int age;
public:
    CDerive(string s, int a) : CBase(s), age(a) { 
        cout << "DERIVE: " << age << endl;
    }
~CDerive() { 
        cout << "~DERIVE" << endl;
    }
};

int main ( ) 
{
    CDerive d("小雅", 27);

return 0;
}