c 2b 2b garbage collection

1// raii.cpp
2
3#include <iostream>
4#include <new>
5#include <string>
6
7class ResourceGuard{
8  private:
9    const std::string resource;
10  public:
11    ResourceGuard(const std::string& res):resource(res){
12      std::cout << "Acquire the " << resource << "." <<  std::endl;
13    }
14    ~ResourceGuard(){
15      std::cout << "Release the "<< resource << "." << std::endl;
16    }
17};
18
19int main(){
20
21  std::cout << std::endl;
22
23  ResourceGuard resGuard1{"memoryBlock1"};
24
25  std::cout << "\nBefore local scope" << std::endl;
26  {
27    ResourceGuard resGuard2{"memoryBlock2"};
28  }
29  std::cout << "After local scope" << std::endl;
30  
31  std::cout << std::endl;
32
33  
34  std::cout << "\nBefore try-catch block" << std::endl;
35  try{
36      ResourceGuard resGuard3{"memoryBlock3"};
37      throw std::bad_alloc();
38  }   
39  catch (std::bad_alloc& e){
40      std::cout << e.what();
41  }
42  std::cout << "\nAfter try-catch block" << std::endl;
43  
44  std::cout << std::endl;
45
46}
47