map

unordered_map<int,int>a; unordered_map<int ,int>::iterator it; it=a.find(8); if(it==a.end())chu("no");   find找的是前面的键值

unordered_map<int,int>mymap; 
 for ( auto it = mymap.begin(); it != mymap.end(); ++it )
    std::cout << " " << it->first << ":" << it->second;
  std::cout << std::endl;

unordered_map<int,int>mymap; unordered_map<int,int>::iterator it; mymap[1]=2; mymap[2]=5; for ( it = mymap.begin(); it != mymap.end(); ++it ) chu("%d %d\n",it->first,it->second); std::cout << std::endl;   循环遍历所有元素 return 0;

 

标签：std,map,end,cout,mymap,unordered
来源： https://www.cnblogs.com/403caorong/p/16522527.html