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C++ std珠玑 #31

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Durant35 opened this issue Sep 6, 2018 · 0 comments

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Durant35 commented Sep 6, 2018

std::lower_bound() & std::upper_bound()

函数lower_bound()在first和last中的前闭后开区间进行二分查找，返回大于或等于val的第一个元素位置(迭代器)；如果所有元素都小于val，则返回last的位置
函数upper_bound则返回大于val的第一个元素位置(迭代器)

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