Get Computer Name and logged user name

Question

I am developing an application. One of the methods needs to capture the computer name and user logged on the machine, then display both to the user. I need it to run on both Win

Answer 1

Regarding Denis's answer, note that getenv("HOSTNAME") for Linux may not always work because the environment variables may not be exported to the program.

Multi-platform C++ code example to fetch just the computer name (this is what worked for my Win7 and CentOS machines):

    char *temp = 0;
    std::string computerName;

#if defined(WIN32) || defined(_WIN32) || defined(_WIN64)
    temp = getenv("COMPUTERNAME");
    if (temp != 0) {
        computerName = temp;
        temp = 0;
    }
#else
    temp = getenv("HOSTNAME");
    if (temp != 0) {
        computerName = temp;
        temp = 0;
    } else {
        temp = new char[512];
        if (gethostname(temp, 512) == 0) { // success = 0, failure = -1
            computerName = temp;
        }
        delete []temp;
        temp = 0;
    }
#endif