Cursor dynamic display : setwritemode (1) function, cursor movements in the original painting a location, thereby erasing the original play cursor effect.

• C下实现的五子棋（非双人对下)。光标的动态显示：采用setwritemode(1)函数，光标移动时在原位置再画一次，从而起到擦除原光标的效果。