bool checkSafe(Reyna rP)
{
var Lr = new List <Reyna>(rL);
Lr.ToString();
for (int b = 0; b < Lr.Count; b++)
{
{
if (rP.getCol() == Lr[b].getCol())
{
return(false);
}
if (Math.Pow(rP.getRow() - Lr[b].getRow(), 2) == Math.Pow(rP.getCol() - Lr[b].getCol(), 2))
{
return(false);
}
}
}
return(true);
}
void backTrack()
{
while (row < 6)
{
while (col < 6)
{
Reyna rPos = new Reyna(col, row); //position of queen
clearBitmap(bmpAnimation, Color.Transparent);
if (safeC)
{
ListAnim.Add(rPos);
}
else
{
ListAnim[row] = rPos; //row
}
for (int x = 0; x < ListAnim.Count(); x++) //animation onboard
{
g.DrawImage(bmpQueen, ListAnim[x].getCol() * 100 + 27, ListAnim[x].getRow() * 100, bmpQueen.Width, bmpQueen.Height); //col row
}
pictureBox1.Refresh();
if (checkSafe(rPos))
{
button2.Enabled = true;
safeC = true;
flag = true;
rL.Add(rPos);
if (rL.Count() == 6)
{
MessageBox.Show("Solution Found");
row = 0;
col = ListAnim[0].getCol() + 1;
ListAnim = new List <Reyna>();
rL = new List <Reyna>();
return;
}
break;
}
safeC = false;
flag = false;
col++;
}
if (flag == false)
{
row = row - 1;
if (row == -1)
{
MessageBox.Show("Programa terminado");
button2.Enabled = false;
break;
}
col = rL[row].getCol() + 1;
rL.RemoveAt(row);
ListAnim.RemoveAt(row);
}
else
{
col = 0;
row++;
}
}
}