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动态数组是程序设计中最基础也最常用的数据结构之一，而C++ STL中的vector正是对动态数组的高效封装。它既要提供连续内存的随机访问性能，又要支持运行时动态增长，这就引出了核心的扩容机制：当size逼近capacity时，vector会按几何倍数重新分配内存并搬运元素。理解size、capacity、reserve与resize的 ...
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