warning: range-based for loop is a C++11 extension

 

 

#include <iostream>

#include <array>
#include <iostream>
using namespace std;

void foo(array<int, 3> const& bar) {

  for (int i : bar) {

    cout << i << endl;

  }

}



int main() {

  array<int,3> const bar = {1,2,3};

  for (int i : bar) {

    cout << i << endl;

  }

  foo(bar);

}

 

 

g++ 4.cpp

 

4.cpp:6:14: warning: range-based for loop is a C++11 extension [-Wc++11-extensions]

  for (int i : bar) {

             ^

4.cpp:13:14: warning: range-based for loop is a C++11 extension [-Wc++11-extensions]

  for (int i : bar) {

             ^

2 warnings generated.

 

g++ a.cpp -std=c++11

./a.out 

1

2

3

1

2

3