Booleans + While loops = ?

Questions & Answers
1

Hi, I've got an odd issue with the below code (I've stripped out the parts that are irrelevant, and any classes/functions referenced are working as expected):

int curNumRooms = 0;

while(curNumRooms < numberOfRooms) {
    int w = Random.Range(minimumRoomSize, maximumRoomSize+1);
    int h = Random.Range(minimumRoomSize, maximumRoomSize+1);

    int x = Random.Range(0, (int)levelSize.x - w - 1);
    int y = Random.Range(0, (int)levelSize.y - h - 1);          

    Rectangle newRoom = new Rectangle(x,y,w,h);

    bool failed = false;

    foreach (Rectangle otherRoom in rooms) {
        if(otherRoom != null) {                 
            if (newRoom.Intersect(otherRoom)) {
                failed = true;
                break;
            }
        }
    }

    if (!failed) {          
        rooms[curNumRooms] = newRoom;
        curNumRooms++;
    }

}

For some reason, `failed` always evaluates to true. I threw in a couple debug messages, and for some reason, failed evaluates twice -- the first time, in the foreach loop, it evaluates correctly. The second time, it evaluates to false. If I initialize `failed` as true, then it evaluates to true the second time, almost as if the while loop was being run twice, and ignoring the foreach loop the second time around.

Why is this?

2

Actually, I just found the error; it was located in my Rectangle.Intersect function, not my while loop.