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並前往https://www.quora.com/Is-there-a-valid-way-to-return-a-pointer-to-a-value-in-a-map-C-pointers-development

Is there a valid way to return a pointer to a value in a map (C ...

Certainly. [code]return &(map.at(key)); [/code]The pointer will remain valid until you modify the map by adding or removing an entry.

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