单例模式
1 #include<stdio.h> 2 #include<stdlib.h> 3 #include<string.h> 4 #include <iostream> 5 #include <limits.h> 6 using namespace std; 7 8 class Singleton 9 { 10 private: 11 Singleton(){}//构造函数私有化 12 static Singleton *m_pInstance; 13 public: 14 static Singleton *GetInstance() 15 { 16 static Singleton *m_pInstance; 17 if(m_pInstance==NULL) 18 m_pInstance = new Singleton(); 19 return m_pInstance; 20 } 21 int test() 22 { 23 return 2; 24 } 25 }; 26 27 int main() 28 { 29 Singleton *p1 = Singleton::GetInstance(); 30 Singleton *p2 = p1->GetInstance(); 31 int a; 32 a=p2->test(); 33 cout<<a; 34 return 0; 35 }
单例模式的目的是保证这个类只有一个实例。
更加详细:http://blog.csdn.net/hackbuteer1/article/details/7460019

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