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  1.  
  2. #include <iostream>
  3. #include <vector>
  4. #include <memory>
  5.  
  6. using XS = std::vector<std::shared_ptr<int>>;
  7.  
  8. void foo(XS const& xs) {
  9.     for (auto& x : xs) {
  10.         *x = 42;
  11.     }
  12. }
  13.  
  14. void print(XS const& xs) {
  15.     std::cout << "<XS>\n";
  16.     for (auto const& x : xs) {
  17.         std::cout << "\t" << *x << "\n";
  18.     }
  19.     std::cout << "</XS>\n";
  20. }
  21.  
  22. int main(int, char**) {
  23.     XS xs;
  24.     for (auto i : { 1, 2, 3}) {
  25.         xs.push_back(std::make_shared<int>(i));
  26.     }
  27.  
  28.     std::cout << "before:\n";
  29.     print(xs);
  30.     foo(xs);
  31.     std::cout << "after:\n";
  32.     print(xs);
  33.  
  34.     return 0;
  35. }
  36.  
  37.  
Success #stdin #stdout 0s 3432KB
comments (?)
stdin
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Standard input is empty
stdout
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before:
<XS>
	1
	2
	3
</XS>
after:
<XS>
	42
	42
	42
</XS>
https://ideone.com/r1zwWC
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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