map::begin - C++ Reference - cplusplus.com - The C++ Resources Network

map::begin - C++ Reference - cplusplus.com - The C++ Resources Network

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日期:2024-05-21
Returns an iterator referring to the first element in the map container. Because map containers keep their elements ordered at all times, begin points to the element that goes first following the container's sorting criterion. If the container is empty, t...看更多