分类目录归档:C/C++

C++智能指针auto_ptr,简单实现

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#include <iostream>
using namespace std;
 
template <class object>
class sian_ptr {
public:
    object *m_object;
    // 构造函数接收外部传入的堆空间对象
    sian_ptr(object *object) : m_object(object) {}
    // 当前对象被释放时,释放外部推空间内存
    ~sian_ptr() {
        if (m_object == nullptr) return;
        delete m_object;
    }
    // 重载运算符->巧妙地将当前对象“指向”外部对象
    object* operator->() {
    	return m_object;
    }
};
 
class Person {
public:
    int m_age;
    Person() {
        cout << "Person()..." << endl;
    }
    ~Person() {
        cout << "~Person()..." << endl;
    }
};
int main() {
    {
        // 模拟智能指针auto_ptr
        // auto_ptr<Person> p(new Person());
        sian_ptr<Person> p(new Person());
        p->m_age = 12;
    }
        system("pause");
        return 0;
}

输出结果:
Person()…
~Person()…
请按任意键继续. . .