智能指针shared_ptr 

 1 void  CloseFile(FILE* ptrFile)
 2 {
 3     if (ptrFile == nullptr)
 4     {
 5         return;
 6     }
 7     CloseFile(ptrFile);
 8     cout << "File Closed." << endL;
 9 }
10 
11 int main()
12 {
13     FILE* f = fopen("data.txt", "w");
14     shared_ptr<FILE>ptrFile(f, CloseFile);
15     if (ptrFile == nullptr)
16     {
17         cerr << "Error Opening file." << endl;
18     }
19     else
20     {
21         cout << "File Opened." << endl;
22     }
23     return 0;
24 }

 

posted @ 2017-10-24 10:41  ye_ming  阅读(216)  评论(0)    收藏  举报