Print computer/system name

This is a discussion on Print computer/system name within the C++ Programming forums, part of the General Programming Boards category; I need my program to print out the name of the computer. Is this possible through C++ at all? Thanks ...

  1. #1
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    Print computer/system name

    I need my program to print out the name of the computer. Is this possible through C++ at all?

    Thanks in advance.

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    Code:
    #include<windows.h>
    char buffer[256];
    DWORD len = 256;
    GetComputerName(buffer, &len);
    cout<<buffer<<endl;
    Nana C++ Library is a GUI framework that designed to be C++ style, cross-platform and easy-to-use.

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    Quote Originally Posted by jinhao
    Code:
    #include<windows.h>
    char buffer[256];
    DWORD len = 256;
    GetComputerName(buffer, &len);
    cout<<buffer<<endl;
    Thank you VERY much. Worked perfectly.
    -Zack

  4. #4
    and the hat of int overfl Salem's Avatar
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    Next time, say which OS/Compiler you're using.
    It was just a lucky guess that you were using windows.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

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    Quote Originally Posted by Salem
    Next time, say which OS/Compiler you're using.
    It was just a lucky guess that you were using windows.
    Ah. Thanks. I'll be sure to state that next time. .
    -Zack

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    heihei, i am so lucky
    Nana C++ Library is a GUI framework that designed to be C++ style, cross-platform and easy-to-use.

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    Thanks for the previous help, guys. However, I must compile it this code on a Unix machine now. I'm using the standard Unix build, cc xxx.cpp.

    How should I print out the system name using that? I assume that I should include a different header file than windows.h.

    Thanks in advance.
    -Zack

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    Hum.. I dunno .. but you could try to acess the environement variables and try to see if there's something that mathces the computer name
    Code:
    #include <iostream>
    
    int main(int argc, char *argv[], char *env[]){
        int i;
        for(i=0;env[i];i++){
            std::cout<<env[i]<<std::endl;
        }
        return 0;
    }
    NOTE: this main declaration ISN'T standard, although it's provided with many compilers as extension., I think. Please correct me if wrong.

    http://www.opengroup.org/onlinepubs/...bd/envvar.html
    http://www.cplusplus.com/ref/cstdlib/getenv.html

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    Quote Originally Posted by xErath
    Hum.. I dunno .. but you could try to acess the environement variables and try to see if there's something that mathces the computer name
    Code:
    #include <iostream>
    
    int main(int argc, char *argv[], char *env[]){
        int i;
        for(i=0;env[i];i++){
            std::cout<<env[i]<<std::endl;
        }
        return 0;
    }
    NOTE: this main declaration ISN'T standard, although it's provided with many compilers as extension., I think. Please correct me if wrong.

    http://www.opengroup.org/onlinepubs/...bd/envvar.html
    http://www.cplusplus.com/ref/cstdlib/getenv.html
    That looks good. Although I'm not sure whether it'll be fine for Unix. I will try it once I get to the office Friday.

    Any other ideas, guys? .
    -Zack

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    Quote Originally Posted by xErath
    Hum.. I dunno .. but you could try to acess the environement variables and try to see if there's something that mathces the computer name
    Code:
    #include <iostream>
    
    int main(int argc, char *argv[], char *env[]){
        int i;
        for(i=0;env[i];i++){
            std::cout<<env[i]<<std::endl;
        }
        return 0;
    }
    NOTE: this main declaration ISN'T standard, although it's provided with many compilers as extension., I think. Please correct me if wrong.

    http://www.opengroup.org/onlinepubs/...bd/envvar.html
    http://www.cplusplus.com/ref/cstdlib/getenv.html
    Yeah, that doesn't seem to be working on Unix machines . Any other ideas, guys? .
    -Zack

  11. #11
    and the hat of int overfl Salem's Avatar
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    Code:
    NAME
           uname − get name and information about current kernel
    
    SYNOPSIS
           #include <sys/utsname.h>
    
           int uname(struct utsname *buf);
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

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    Quote Originally Posted by Salem
    Code:
    NAME
           uname − get name and information about current kernel
    
    SYNOPSIS
           #include <sys/utsname.h>
    
           int uname(struct utsname *buf);
    I get this error - fatal error C1083: Cannot open include file: 'sys/utsname.h': No such file or directory
    Error executing cl.exe.
    -Zack

  13. #13
    and the hat of int overfl Salem's Avatar
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    Oh please - you asked for a unix answer and I gave you one.
    Then you turn around and try and compile it with a windows compiler!
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

  14. #14
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    Quote Originally Posted by Salem
    Oh please - you asked for a unix answer and I gave you one.
    Then you turn around and try and compile it with a windows compiler!
    It has to work on both .
    -Zack

  15. #15
    and the hat of int overfl Salem's Avatar
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    Tough - it won't, nor can it ever work on both.

    Certainly, there's no standard way to find out.

    I suppose you could find some very common library somewhere, which might happen to tell you which machine you're on...
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

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