[CareerCup] 9.7 Paint Fill 填充 - Grandyang - 博客园



[CareerCup] 9.7 Paint Fill 填充 - Grandyang - 博客园

[CareerCup] 9.7 Paint Fill 填充

 

9.7 Implement the "paint fill" function that one might see on many image editing programs. That is, given a screen (represented by a two-dimensional array of colors), a point, and a new color, fill in the surrounding area until the color changes from the original color.

 

这道题是一道填充问题,有点类似于Flash中的油桶工具,就是给指定的位置填充颜色,如果要填充的颜色和原来的颜色相同,则不发生变换,如果不同的话,则把相连接的区域都填充为新的颜色。那么我们使用递归来做,首先判断要填充的颜色和该位置上原有的颜色是否相同,如果不同的话就开始填充,如果周围颜色和起始位置颜色相同也填充,参见代码如下:


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