Noob - Hello World Not Working

This is a discussion on Noob - Hello World Not Working within the C++ Programming forums, part of the General Programming Boards category; I am new to programming in C++. I have a bit of experience in Python and ActionScript3. I decided to ...

  1. #1
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    Noob - Hello World Not Working

    I am new to programming in C++. I have a bit of experience in Python and ActionScript3. I decided to pick up C++ so I downloaded Dev-C++ complier.

    I tried to run the following code but it doesn't seem to do anything. I complied the code, and it did not show any errors. I went to run it and a window appeared really quickly on the screen. It then closed itself after 0.5 seconds. I got the code from cPlusPlus.com.

    Do I have to configure a setting or something? I remember when I was working with Python, I had to reconfigure some sort of path directory for Windows.

    Code:
    #include <iostream>
    using namespace std;
    
    int main ()
    {
      cout << "Hello World!";
      return 0;
    }

  2. #2
    and the Hat of Guessing tabstop's Avatar
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    So, in Windows, when a program ends, its window closes. (When you shut down Word, you don't expect to still see your document up on the screen, do you?) You can read the FAQs on this very site for how to keep your program running.

    However, you haven't really made a Windows program -- you've made a command-line program that's meant to be run from a terminal window.

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    What is a "command-line program" and a "terminal window"?

  4. #4
    and the Hat of Guessing tabstop's Avatar
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    So, go to Start -> All Programs -> Accessories -> Command Prompt.

    This is the mechanism by which you communicate with your computer.

  5. #5
    ...and never returned. StainedBlue's Avatar
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    In other words, something is needed to halt the program like something to get the user to physically close it...

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    ...and never returned. StainedBlue's Avatar
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    >>Do I have to configure a setting or something? I remember when I was working with Python, I had to reconfigure some sort of path directory for Windows.

    No. I trust since it compiled without error, Dev-C++ has added mingw.exe (the compiler) to your path, so no worries there. Your program executes just fine. It just needs some massaging.

    CLUE: This is a non-issue for Code::Blocks or Visual C++ Express IDEs...

    Compile and run this:
    Code:
    #include <iostream>
    
    void sys_pause();
    
    int main(int argc, char *argv[])
    {
    	sys_pause();
    	return 0;
    }
    
    void sys_pause()
    {
    	std::cout << "Press [Enter] to continue...";
    	std::cin.ignore( 256, '\n' );
    }
    Last edited by StainedBlue; 09-13-2009 at 06:23 PM.

  7. #7
    Banned ಠ_ಠ's Avatar
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    Code:
    system("pause");
    ╔╗╔══╦╗
    ║║║╔╗║║
    ║╚╣╚╝║╚╗
    ╚═╩══╩═╝

  8. #8
    ...and never returned. StainedBlue's Avatar
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    Quote Originally Posted by ಠ_ಠ View Post
    Code:
    system("pause");
    ^never a good idea.

  9. #9
    Malum in se abachler's Avatar
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    portable solution that works with every IDE

    Code:
    #include <iostream>
    #include <conio>
    using namespace std;
    
    int main (){
        cout << "Hello World!\n";
        cout << "Press any key to continue..."  
        getch();
        return 0;
        }
    Until you can build a working general purpose reprogrammable computer out of basic components from radio shack, you are not fit to call yourself a programmer in my presence. This is cwhizard, signing off.

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    Thanks guys.

  11. #11
    and the hat of sweating
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    Quote Originally Posted by abachler View Post
    portable solution that works with every IDE

    Code:
    #include <iostream>
    #include <conio>
    using namespace std;
    
    int main (){
        cout << "Hello World!\n";
        cout << "Press any key to continue..."  
        getch();
        return 0;
        }
    Why do you have the \n and the next cout line in red?
    Oh wait, you forgot the ; at the end of the cout line.
    "I am probably the laziest programmer on the planet, a fact with which anyone who has ever seen my code will agree." - esbo, 11/15/2008

    "the internet is a scary place to be thats why i dont use it much." - billet, 03/17/2010

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    Quote Originally Posted by cpjust View Post
    Why do you have the \n and the next cout line in red?
    Oh wait, you forgot the ; at the end of the cout line.
    Not to forget that \n shouldn't be used in this case, but rather std::endl.

  13. #13
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    Got it working. Thanks

  14. #14
    Malum in se abachler's Avatar
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    Quote Originally Posted by cpjust View Post
    Why do you have the \n and the next cout line in red?
    Oh wait, you forgot the ; at the end of the cout line.
    yeah it was a bit of a quicky reply.

    The red shows the changes I made to the OP's code.
    Until you can build a working general purpose reprogrammable computer out of basic components from radio shack, you are not fit to call yourself a programmer in my presence. This is cwhizard, signing off.

  15. #15
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    Quote Originally Posted by abachler
    portable solution that works with every IDE
    How is that considered portable? It won't work on my system at all. Unless by "portable", you mean portable across Windows compilers, in which case it may be true.
    bit∙hub [bit-huhb] n. A source and destination for information.

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