Capture Computer Name and User Name

In Windows environment you can use getenv("COMPUTERNAME") , getenv("USER") .

In Linux - getenv("HOSTNAME") , getenv("USER") .

See also reference getenv .

Complementing the above answer,

getenv() returns:

• "A% of% with the value of the requested environment variable, or
• "A null pointer if no environment variable exists."

C String sets the environment variable that stores the user name to $ USER, so to use the function in linux to get the current user name, make linux .

You can type "set" in a console / terminal / prompt window and see all environment variables currently configured in getenv("USERNAME") . There you should find "USERNAME" instead of "USER".

In%%, if you type "env" in the terminal, you will see that there is a "USER" variable, saving the current user name.

windows is set to linux Example:

#include <iostream>
#include <cstdlib>

int main(){
   /*Para obter o nome de usuário no linux*/
   #ifdef __linux__
      std::cout << "O nome do usuário atual é: " << getenv("USER") << std::endl;
   #endif
   /*Para obter o nome de usuário no windows*/
   #ifdef _WIN32
      std::cout << "O nome do usuário atual é: " << getenv("USERNAME") << std::endl; 
   #endif
}