Learning about the map data type C-CodePudding

I study in accordance with the above the CSDN tutorials, map<> The data type, know that he is a hash structure, then according to the code on the network retrieval, but an error code is as follows:

//learning map function 
//time: 2020.5.30 
//reference: 
//1. https://blog.csdn.net/shuzfan/article/details/53115922? Utm_medium=distribute. Pc_relevant. None - task - blog - BlogCommendFromMachineLearnPai2-2. Nonecase& Depth_1 - utm_source=distribute. Pc_relevant. None - task - blog - BlogCommendFromMachineLearnPai2-2. Nonecase 
//2. https://www.cnblogs.com/omelet/p/6617362.html 

//the code below error 
# include 
# include 

//define the map type variable 
Map Id_name; 

//for id_name assignment 
Map Id_name={
{2015, "WZQ"}, 
{2022, "222"}, 
{222, "233"} 
};

An error is as follows:

Hope can to solve this bug, thanks.

CodePudding user response:

STL: : map STL: : string
Or
using namespace std;

CodePudding user response:

reference 1/f, the truth is right or wrong response:

STL: : map STL: : string
Or
using namespace std;

thank you I will try

CodePudding user response:

Additional header file
# inlcude & lt; string>//note & lt; string> And & lt; String. H> The difference between
Additional namespace
using namespace std;