本文介绍了查找地图的映射值的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
Is there a way in C++ to search for the mapped value (instead of the key) of a map, and then return the key? Usually, I do someMap.find(someKey)->second to get the value, but here I want to do the opposite and obtain the key (the values and keys are all unique).
解决方案
Because of how a map is designed, you'll need to do the equivalent of a search on unordered data.
for (auto it = someMap.begin(); it != someMap.end(); ++it)
if (it->second == someValue)
return it->first;
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