3.索引与string进行映射实现高效查找

 #include <iostream>
 #include <typeindex>//类型索引
 #include <unordered_map>//红黑树
 #include <string>
 using namespace std;

 class myclass
 {

 };

 void main()
 {
     //索引与string进行映射
     unordered_map<type_index, string> mytype;//类型与字符串映射
     mytype[typeid(int)] = "整数类型";
     mytype[typeid(double)] = "整数类型";
     mytype[typeid(myclass)] = "我的类";

     cout << mytype[typeid(int)] << endl;
     cout << mytype[typeid(double)] << endl;
     cout << mytype[typeid(myclass)] << endl;
     cin.get();
 }