Hello World Problem

This is a discussion on Hello World Problem within the C++ Programming forums, part of the General Programming Boards category; Hi, Im new to programming 'n am using Dev C++ as compiler.Im trying to code the very basic Hello World ...

  1. #1
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    Hello World Problem

    Hi,
    Im new to programming 'n am using Dev C++
    as compiler.Im trying to code the very basic
    Hello World program in it but its giving errors.
    Im referring to the book "Sams Teach Yourself
    C++ in 24 Hours by Jesse Liberty"
    Heres the code:

    Code:
    #include <iostream.h>
    
    int main()
    {
        cout << "Hello World!\n";
        return 0;
    }
    What can the problem be?

    Khotwadi

  2. #2
    Handy Andy andyhunter's Avatar
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    Well, what error are you recieving? Or are you just getting a warning about using deprecated headers?
    i don't think most standard compilers support programmers with more than 4 red boxes - Misplaced

    It is my sacred duity to stand in the path of the flood of ignorance and blatant stupidity... - quzah

    Such pointless tricks ceased to be interesting or useful when we came down from the trees and started using higher level languages. - Salem

  3. #3
    Registered User mrafcho001's Avatar
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    today we do it like this:

    Code:
    #include <iostream>
    using namespace std;
    
    int main()
    {
        cout << "Hello World" << endl;
        return 0;
    
    ----------------------------------------------------
    for your compiler:
    ----------------------------------------------------
    #include <iostream>
    using namespace std;
    
    int man()
    {
    cout << "Hello world" << endl;
    system("PAUSE");              // So the program stop before it exits
    return 0;
    }

  4. #4
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    Could use cin.get(); instead of system("PAUSE"); so you dont have to include windows.h.

  5. #5
    Registered User mrafcho001's Avatar
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    Quote Originally Posted by RedZone
    Could use cin.get(); instead of system("PAUSE"); so you dont have to include windows.h.

    You don't need <windows.h> for system("PAUSE")....

  6. #6
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    Your book is old and outdated. AFAIK the latest edition of that book is the 3rd edition which uses the correct headers. Either buy the latest edition, buy a different, new book (e.g. Accelerated C++ by Koenig & Moo), or spend some time on the net finding out the differences between your book's code and modern, correct code.

    The 3rd edition of the book uses the following code instead. Check out the examples and you might see how to update the rest of your code.
    Code:
    #include <iostream>
    
    int main()
    {
         std::cout << "Hello World!\n";
         return 0;
    }

  7. #7
    Super Moderator
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    His current book is fine as long as he keeps this in mind:

    - You need to use namespaces. Easiest way to do this is just add "using namespace std;" after your #include's. There are other methods, but until you get quite advanced, there is no use for the additional confusion.

    - For standard headers, you drop the ".h" extension. Precede the following headers with a "c" (so, for example, <assert.h> would become <cassert>):

    <assert.h>
    <ctype.h>
    <errno.h>
    <float.h>
    <limits.h>
    <locale.h>
    <math.h>
    <setjmp.h>
    <signal.h>
    <stdarg.h>
    <stddef.h>
    <stdio.h>
    <stdlib.h>
    <string.h>
    <time.h>

    The system() function comes from of <cstdlib>, but you should still replace it with something else. See this for details: http://www.cprogramming.com/tips/sho...ount=30&page=1

  8. #8
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    Quote Originally Posted by mrafcho001
    You don't need <windows.h> for system("PAUSE")....
    If you're doing it the old way like hes doing [#include <iostream.h>] then you need windows.h

  9. #9
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    I have the fifth edition of the 21 days book. It reads exactly..

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

  10. #10
    Registered User
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    2,662
    Instead of these hieroglyphics at the top of your program:
    Code:
    #include <iostream.h>
    use these hieroglyphics instead:
    Code:
    #include <iostream>
    using namespace std;
    With some compilers(= the thing you run your programs with), you may have to include a line of code before the last line as well:
    Code:
    ....
       cin.get();  //or system("pause");
       return 0;
    }
    Last edited by 7stud; 06-12-2005 at 01:10 PM.

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