在boost中,有一个智能指针类shared_ptr能够管理好咱们的指针。这里我不详解,如下列出使用例子。本身现写现调经过的哈:
ios
#include <iostream> #include <boost/shared_ptr.hpp> #include <boost/make_shared.hpp> using namespace std; using namespace boost; class Person { public: Person(string name, int age) : m_name(name), m_age(age) { cout << "construct" << endl; } ~Person() { cout << "destruct" << endl; } void print(void) { cout << "name:" << m_name << ", age:" << m_age << endl; } private: string m_name; int m_age; }; int main( int argc, char *argv[] ) { cout << "Hello, This is a test of shared_prt" << endl; if (1) { shared_ptr<Person> pMan = make_shared<Person>("Peter Lee", 24); pMan->print(); } cout << "End test" << endl; return 0; }编译运行结果:
其实上面展现的功能scoped_ptr也有。但scoped_ptr是不可复制的,而shared_ptr的特色是任意复制的。shared_ptr内部有一个引用计数器,记录当前这个指针被几个shared_ptr共享。 spa