不能被继承的类(私有构造函数) 代码(C++)
本文地址: http://blog.csdn.net/caroline_wendy
题目: 用C++设计一个不能被继承的类.
可以使用私有构造函数, 并提供静态成员函数, 返回和删除类的实例.
则只能在堆上创建实例, 不能在栈上创建.
代码:
/*
* main.cpp
*
* Created on: 2014.7.13
* Author: Spike
*/
#include <iostream>
#include <list>
using namespace std;
class SealedClass {
public:
static SealedClass* GetInstance() {
return new SealedClass();
}
static void DeleteInstance(SealedClass* pInstance) {
delete pInstance;
}
private:
SealedClass() {cout << "Constructor" << endl;}
~SealedClass() {cout << "Destructor" << endl;}
};
int main(void)
{
SealedClass* s = SealedClass::GetInstance();
SealedClass::DeleteInstance(s);
return 0;
}
输出:
Constructor Destructor