c++windowsdev-c++

Get current username in C++ on Windows

I am attempting to create a program that retrieves the current user's username on Windows using C++.

I tried this:

char *userName = getenv("LOGNAME");
stringstream ss;
string userNameString;
ss << userName;
ss >> userNameString;
cout << "Username: " << userNameString << endl;

Nothing is outputted except "Username:".

What is the simplest, best way to get the current username?

Solution

  • Use the Win32API GetUserName function. Example:

    #include <windows.h>
#include <Lmcons.h>

char username[UNLEN+1];
DWORD username_len = UNLEN+1;
GetUserName(username, &username_len);