for loops

[helshahaby]

I found this example in the link:

http://www.cplusplus.com/doc/tutorial/arrays/

at the bottom of the page.

#include <iostream>

using namespace std;

int main()
{
int myarray[3] = {10,20,30};

for (int i=0; i<3; ++i)
++myarray[i];

for (int elem : myarray) //I don't understand this line
cout << elem << '\n';
}


when I tried to run it ,I got an error due to the for (int elem : myarray)
is it a mistake in the example

Thank you

[Peter87]

It's a new feature that was added in C++11. If you have an old compiler it will not work.