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  1. #include <cassert>
  2. #include <iostream>
  3. #include <vector>
  4.  
  5. int main()
  6. {
  7. 	std::vector<int> v = {1, 2, 3, 4, 5, 6, 7};
  8. 	auto p = v.begin() + 3;
  9.  
  10.     std::vector<int> w = v;
  11.     v.erase(p, v.end());
  12.     w.swap(v);
  13.  
  14.     assert(p == w.end());
  15.  
  16.     std::cout << "v:";
  17.     for (auto n : v) { std::cout << " " << n; }
  18.     std::cout << "\n";
  19.  
  20.     std::cout << "w:";
  21.     for (auto n : w) { std::cout << " " << n; }
  22.     std::cout << "\n";
  23. }
Success #stdin #stdout 0s 3456KB
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stdin
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Standard input is empty
stdout
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v: 1 2 3 4 5 6 7
w: 1 2 3
https://ideone.com/7jsSOK
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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