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  1. #include <iostream>
  2. #include <vector>
  3. #include <string.h>
  4. #include <memory>
  5. using  namespace std;
  6.  
  7. template< typename T >
  8. struct array_deleter
  9. {
  10.   void operator ()(T const * x)  { delete[] x; }
  11. };
  12.  
  13. class MemoryPage
  14. {
  15.     size_t size;
  16.     std::shared_ptr<char> buf;
  17.  
  18.     public:
  19.   explicit MemoryPage(int sz=8)
  20.   : size(sz) 
  21.   , buf (new char[sz], array_deleter<char>())
  22.   {
  23.        std::cout<<"buffer='" << buf<<"'"<<" start address "<<(void *)buf.get()<<std::endl;
  24.  
  25.        // std::cout<<"sz=" << size<<std::endl;
  26.        // for(size_t i=0;i <size; i++){
  27.        //    buf[i]='a'+32/sz - 1 ;
  28.        // }
  29.      }
  30.  
  31.     // ----- Деструктор вообще не нужон --------
  32.     // ~MemoryPage(){
  33.     //     if(buf[0]!=null ) {
  34.     //      std::cout<<"buffer='" << buf<<"'"<<" delete from  address "<<(void *)buf.get()<<"\t"<< size<<" bytes "<<std::endl;
  35.     //     delete[] buf;
  36.     //    }
  37.     //  }
  38.   };
  39. using namespace std;
  40. int main()
  41. {
  42.     vector<MemoryPage> vm;
  43.     MemoryPage memoryPage(1024);
  44.     vm.push_back(MemoryPage(32));
  45.     vm.push_back(MemoryPage(16));
  46.     vm.push_back(MemoryPage(8));
  47.     cout<<" destroy vector "<< endl;
  48. }
  49.  
Success #stdin #stdout 0s 3416KB
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stdin
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Standard input is empty
stdout
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buffer='' start address 0x90d7a10
buffer='' start address 0x90d7e30
buffer='' start address 0x90d7e80
buffer='' start address 0x90d7e70
 destroy vector
https://ideone.com/wTSxcA
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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