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  1. #include <iostream>
  2. #include <vector>
  3. using namespace std;
  4.  
  5. class hoge{
  6. public:
  7.   int *a;
  8.   int size;
  9.   hoge(int a[],int size):a(a),size(size){};
  10.   int sum(){
  11.     int s=0;
  12.     for(int i =0;i<size;i++)s+=a[i];
  13.     return s;
  14.   }
  15. };
  16.  
  17. int main(){
  18.   vector<int> a={1,2,3};
  19.   hoge huga(&[&]{return a;}()[0],a.size());
  20.   cout<<huga.sum()<<endl;
  21.   a.push_back(4);
  22.   cout<<huga.sum()<<endl;
  23.   return 0;
  24. }
Success #stdin #stdout 0s 3468KB
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https://ideone.com/R8pyc7
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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