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  1. #include <vector>
  2. using namespace std;
  3.  
  4. class my_vec: vector<int>
  5. {
  6. public:
  7.     using vector<int>::push_back;
  8. };
  9.  
  10. int main()
  11. {
  12.     my_vec x;
  13.     x.push_back(0);
  14.     vector<int> &y = x;
  15. }
Compilation error #stdin compilation error #stdout 0s 3468KB
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stdin
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Standard input is empty
compilation info 
prog.cpp: In function ‘int main()’:
prog.cpp:14:22: error: ‘std::vector<int>’ is an inaccessible base of ‘my_vec’
     vector<int> &y = x;
                      ^
prog.cpp:14:18: warning: unused variable ‘y’ [-Wunused-variable]
     vector<int> &y = x;
                  ^
stdout
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Standard output is empty
https://ideone.com/8CvWW7
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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