写个小程序，用到了List，而且要用到它的Iterator，由于以前有用vector的经验，想当然的在Iterator上做了一个+3的操作，结果报错。当时FT，然后开始写测试程序，顺便上网去转转，结果程序写到一半的时候，看到篇文章比较各种Iterator，然后明白了，List的Iterator是双向的，而vector的Iterator是random的，就有了对+n这一操作支持的不同，而从前没看过的我就稀里糊涂的FT了。写下来，防止以后再稀里糊涂，嗯。
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朋友，说的具体点可以吗？
我看了半天也没明白，我想在list 用 Iterator时往后比如 +n 操作是错的，怎样才能办到呢？ 做n次++ 那就不用说的。
@fanq: STL中List的Iterator是双向Iterator，不支持直接+n的操作，如果要使用+n的操作，需要使用random的Iterator，就是使用vector。我不清楚能不能在List中使用Vector的Iterator。
应该说清楚了吧，呵呵 ^_^
谢谢！