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  1. #include <iostream>
  2. #include <vector>
  3. using namespace std;
  4.  
  5. struct X {
  6.     explicit X(int n) : N(n) {}
  7.     int N;
  8.     void print() const { cout << "X::N=" << N << endl; }
  9. };
  10.  
  11. class Y {
  12. public:
  13.     Y() {
  14.         _v.push_back(X(10));
  15.         _v.push_back(X(20));
  16.     }
  17.  
  18.     X& get(int index) {
  19.         return _v.at(index);
  20.     }
  21.  
  22. private:
  23.     vector<X> _v;
  24. };
  25.  
  26. int main() {
  27.     Y y;
  28.     X& x1 = y.get(0);
  29.     x1.print(); // prints 10
  30.  
  31.     x1 = X(100);
  32.     y.get(0).print(); // prints 100
  33. }
  34.  
Success #stdin #stdout 0s 3472KB
comments (?)
stdin
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Standard input is empty
stdout
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X::N=10
X::N=100
https://ideone.com/bYxG6p
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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