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  1. #include <vector>
  2. #include <memory>
  3. #include <algorithm>
  4. #include <iostream>
  5.  
  6. int main()
  7. {
  8.   using namespace std;
  9.  
  10.   vector<size_t> v;
  11.   v.push_back(1);
  12.   v.push_back(2);
  13.   v.push_back(3);
  14.  
  15.   unique_ptr<char[]> p( new char[v.size() * sizeof(size_t)] );
  16.  
  17.   // copy data from v into char array
  18.   copy( reinterpret_cast<char *>(v.data()), 
  19.         reinterpret_cast<char *>(v.data()) + v.size() * sizeof(size_t),
  20.         p.get() );
  21.  
  22.   vector<size_t> w;
  23.   w.resize(3);
  24.  
  25.   // copy data from char array into w
  26.   copy( p.get(), p.get() + v.size() * sizeof(size_t), reinterpret_cast<char *>(w.data()) );
  27.  
  28.   for( size_t i = 0; i < w.size(); ++i ) {
  29.     cout << w[i] << " ";
  30.   }
  31. }
  32.  
Success #stdin #stdout 0s 3064KB
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https://ideone.com/7H8dy
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
secret

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