foreach loop in 2D Arrays in C++

Question

I have a 3x3 2D array. I want to reach to all of it's elements. Is it possible? I do this:

int myArray[3][3];
for(int &i: myArray){
   //MY CODE HERE.
}

But when I do, I get error:

error: C2440: 'initializing' : cannot convert from 'int [3]' to 'int &'

I also use MSVC++ 2012 compiler on Qt 5.0 x64. And if it's possible to do so, then how can I get the index number of each element?

Solution

Just use auto keyword

int myArray[3][3];

for(auto& rows: myArray) // Iterating over rows
{
    for(auto& elem: rows)
    {
        // do some stuff
    }
}

Comments

[mwerschy]

Wont that make i an int* though?

[awesoon]

@MohammadRezaHajianpour, auto keyword is a C++11 feature, yes(like range-based for loop)

[awesoon]

@mwerschy, it this case, rows will be deduced as int (&)[3].

[mwerschy]

I was talking about what you were doing before you edited ;) Though you are of course right that it wouldn't have been an int*.

[Daniël van den Berg]

This does not compile, and won't. for ( : ) won't work with an int*.

[Daniël van den Berg]

As a note, generally don't use using namespace std nor cout << endl; stackoverflow.com/questions/1452721/… stackoverflow.com/questions/213907/stdendl-vs-n