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过犹不及。到处滥用shared_ptr的我也见过，可以说是学艺不精，也可以说是没有入门。 那么到底何时应该使用shared_ptr？ 一个好的经验法则是：只有在你无法明确回答"谁应该删除这个对象"时，才考虑使用 shared_ptr。 其实大部分时候，一个对象的持有者都是非常明确的，所以shared_ptr的使用场景并不多见，尤其是在同步程序中更是少见。