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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.   int i[12] = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
  6.  
  7.   for (auto v : i)
  8.     std::cout << v << std::endl;
  9.  
  10.   for (auto& v : i)  // Add "&" here.
  11.     v = v + 1;
  12.  
  13.   for (auto v : i)
  14.     std::cout << v << std::endl;
  15.  
  16.   return 0;
  17. }
Success #stdin #stdout 0s 4564KB
comments (?)
stdin 
Standard input is empty
stdout 
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
2
2
https://ideone.com/DVQllH
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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