Installed sublime text 3 for c++ but showing "No such file or directory" include "wchar.h"

I've been trying to run simple c++ program

#include<iostream.h>
using namespace std;        
void main(){
    cout<<"helloworld";
}

But got a error like this:

In file included from d:\mingw\lib\gcc\mingw32\9.2.0\include\c++\bits\postypes.h:40:0,                   
                 from d:\mingw\lib\gcc\mingw32\9.2.0\include\c++\iosfwd:40,                              
                 from d:\mingw\lib\gcc\mingw32\9.2.0\include\c++\ios:38,                                 
                 from d:\mingw\lib\gcc\mingw32\9.2.0\include\c++\ostream:38,                             
                 from d:\mingw\lib\gcc\mingw32\9.2.0\include\c++\iostream:39,                            
                 from my.cpp:1:                                                                         
d:\mingw\lib\gcc\mingw32\9.2.0\include\c++\cwchar:44:10: fatal error: wchar.h: No such file or directory 
 #include <wchar.h>                                                                                      
                   ^                                                                                     
compilation terminated."

I have updated sublime-build file for windows and also changed environment variables. Please help me to fix this error in sublime. I am using MinGW compiler.