判断在指定方向上是否有连续5个行棋方的棋子?
/*判断在指定方向上是否有连续5个行棋方的棋子*/
int JudgeWinLine(int Order,struct point Cursor,int direction)
{
int i;
struct point pos,dpos;
const int testnum = 5;
int count;
switch(direction)
{
case 0:/*在水平方向*/
pos.x=Cursor.x-(testnum-1);
pos.y=Cursor.y;
dpos.x=1;
dpos.y=0;
break;
case 1:/*在垂直方向*/
pos.x=Cursor.x;
pos.y=Cursor.y-(testnum-1);
dpos.x=0;
dpos.y=1;
break;
case 2:/*在左下至右上的斜方向*/
pos.x=Cursor.x-(testnum-1);
pos.y=Cursor.y+(testnum-1);
dpos.x=1;
dpos.y=-1;
break;
case 3:/*在左上至右下的斜方向*/
pos.x=Cursor.x-(testnum-1);
pos.y=Cursor.y-(testnum-1);
dpos.x=1;
dpos.y=1;
break;
}
count=0;
for(i=0;i<testnum*2+1;i++)
{
if(pos.x>=0&&pos.x<=18&&pos.y>=0&&pos.y<=18)
{
if(gChessBoard[pos.x][pos.y]==Order)
{
count++;
if(count>=testnum)
return TRUE;
}
else
count=0;
}
pos.x+=dpos.x;
pos.y+=dpos.y;
}
return FALSE;
}
--------------------------
麻烦哪位能给我详细讲一下
for(i=0;i<testnum*2+1;i++)
{
if(pos.x>=0&&pos.x<=18&&pos.y>=0&&pos.y<=18)
{
if(gChessBoard[pos.x][pos.y]==Order)
{
count++;
if(count>=testnum)
return TRUE;
}
else
count=0;
}
pos.x+=dpos.x;
pos.y+=dpos.y;
这段具体是怎样运行的呢?