我最近已将MinGW下载到我的计算机中，但是在使用某些容器和迭代器（例如unordered_map和auto）时会显示意外错误。

我的代码如下：

#include <bits/stdc++.h>
#include<unordered_map>
using namespace std;


int main()
{

    unordered_map<string,int> umap; 

    umap["GeeksforGeeks"] = 10; 
    umap["Practice"] = 20; 
    umap["Contribute"] = 30; 

    for (auto x : umap) 
      cout << x.first << " " << x.second << endl; 


    return 0;
}

它给出以下错误：

C:\Users\naima\Documents\cpp>g++ -o try2 try2.cpp
In file included from C:/tdm-gcc-64/lib/gcc/x86_64-w64-mingw32/5.1.0/include/c++/unordered_map:35:0,from try2.cpp:2:
C:/tdm-gcc-64/lib/gcc/x86_64-w64-mingw32/5.1.0/include/c++/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support is currently experimental,and must be enabled with the -std=c++11 or -std=gnu++11 compiler options.
 #error This file requires compiler and library support for the \
  ^
try2.cpp: In function 'int main()':
try2.cpp:9:5: error: 'unordered_map' was not declared in this scope
     unordered_map<string,int> umap;
     ^
try2.cpp:9:25: error: expected primary-expression before ',' token
     unordered_map<string,int> umap;
                         ^
try2.cpp:9:27: error: expected primary-expression before 'int'
     unordered_map<string,int> umap;
                           ^
try2.cpp:11:5: error: 'umap' was not declared in this scope
     umap["GeeksforGeeks"] = 10;
     ^
try2.cpp:15:15: error: 'x' does not name a type
     for (auto x : umap)
               ^
try2.cpp:19:5: error: expected ';' before 'return'
     return 0;
     ^
try2.cpp:19:5: error: expected primary-expression before 'return'
try2.cpp:19:5: error: expected ';' before 'return'
try2.cpp:19:5: error: expected primary-expression before 'return'
try2.cpp:19:5: error: expected ')' before 'return'