I have a problem using the Logical OR operator in C++. The problem is coming that the right-side expression is not evaluated if the left-side is true. I have two deque-s and I need to popLeft from them with a while, but if I can pop from the first deque, I don't pop from the second because is not evaluated, by the OR operator. How can I overcome this problem. Here is the piece of code:

while( D.popLeft( k ) || E.popLeft( m ) )
{
    if( k < m )
    {
      C.pushRight( k );
      E.pushLeft( m );
    }
    else
    {
      C.pushRight( m );
      D.pushLeft( k );
    }
}