如何通过键对unordered_map进行排序？我需要打印按键排序的unordered_map.
解决方法
std::unordered_map<int,int> unordered;
std::map<int,int> ordered(unordered.begin(),unordered.end());
for(auto it = ordered.begin(); it != ordered.end(); ++it)
std::cout << it->second;
std::unordered_map<int,int> unordered;
std::map<int,int> ordered(unordered.begin(),unordered.end());
for(auto it = ordered.begin(); it != ordered.end(); ++it)
std::cout << it->second;
