Return an array in c++

Question

Suppose I have an array

int arr[] = {...};
arr = function(arr);

I have the function as

 int& function(int arr[])
 {
//         


        

Answer 1

Following works and doesn't seem messy or mis-understandable!

int* returnarray(int a[])
{
    for (unsigned int i = 0; i < 3; i++)
    {
        a[i] *= 2;
    }
    return a;
}

int main(int argc, char* argv[])
{
    int arr[3] = {1,2,3};
    int* p = returnarray(arr);
    for (unsigned int i = 0; i < 3; i++)
    {
        cout << "p[" << i << "] = " << p[i] << endl; 
    }
        cin.get();
        return 0;
}