Opening a file from the a console program

This is a discussion on Opening a file from the a console program within the C++ Programming forums, part of the General Programming Boards category; Is it possible? If so someone please tell me how to open a file... eg. i want to the user ...

  1. #1
    Aspiring "Software Guy"
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    Question Opening a file from the a console program

    Is it possible? If so someone please tell me how to open a file... eg. i want to the user to view a shockwave movie or i want to open word thru c++(console) ...
    Plz someonle help me out...
    Im a newbie..

    Pritin

  2. #2
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    Do you mean executing an executable file (.exe) or you mean how to open and read file with ASCII content (.txt for example) ?
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  3. #3
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    From the mention of shockwave movie and all that, I'd guess running an executable.

    Umm, there's system(), but everyone hates using that.


    Umm, here's some stuff from MSDN, http://msdn.microsoft.com/library/de...e_handling.asp, specifically you'd want _execl to wexecvpe, then all the _spawn ones

    Then you can pass stuff like the file to open via command line arguments for a bunch of programs. Passing IE a website as a param makes it open up and go to that website for example.

  4. #4
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    Sorry i forgot to mention i was using Borland c++ Builder...

    The site you provided me above were related to Visual C++...
    Does it make a difference? or are the commands the same...

    If the commands are same, could someone please please post a sample snippet?

    Thanx a lot for helping though..
    ..
    ..
    Pritin

    P.S :: I did not mean files with ASCII value, i meant executables...

    I just started C++... hardly a month...

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    ShellExecute is also a good way....
    [C++]
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    Sorry to be such a pain in the neck, but isnt the previous post by "publikum" a Windows application? Or is it for the console and has a particular header file...

    If im wrong please correct me...

    Just in case my query still isnt clear,...
    ------------
    Say for example im making a tutorial comprising of several separate shockwave or flash movies... I want to let the user open and view the movies, and when the user quits, i want to have stored the last movie viewed, and continue from there next time.
    Please note :: Ive just started C++

    -------------


    Thanx people,

    Pritin.
    pritin.cool@gmail.com

  7. #7
    Nonconformist Narf's Avatar
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    If im wrong please correct me...
    At the bottom of the page it tells you what header to use and what library to import. You can use ShellExecute in a console program, it's not restricted to Win32 applications.
    Just because I don't care doesn't mean I don't understand.

  8. #8
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    EDIT: Minute late.

    I believe (from the content of the afore-linked webpage) that ShellExecute is a premade function with the header file "shellapi.h" Info on this function (well, other than syntax details and use) is at the bottom of the link publikum mentioned.

  9. #9
    Frequently Quite Prolix dwks's Avatar
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    This is in the FAQ.
    dwk

    Seek and ye shall find. quaere et invenies.

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    My compiler does not have shellapi.h -- it's turbo c++ ... very primitive... is there any other way..?

    Could someone tell me how exactly it can be done using system("...")?

    I saw it in FAQ, but it dint really work... it just took a lot of time compiling... screen turned black...(on execution) and returned back to normal... no exe was executed...

  11. #11
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    its a better idea to get a new compiler. try dev-c++
    Free the weed!! Class B to class C is not good enough!!
    And the FAQ is here :- http://faq.cprogramming.com/cgi-bin/smartfaq.cgi

  12. #12
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    Question Problem with Dev c++ 4.9.9.2

    The reason i try to avoid using dev c++ even though i have it, is because it gives lots of erreors... so i only use it to print the prog.

    eg.

    Code:
    #include<iostream.h>
    
    void main()
    {
    cout << "Hello";
    }
    Gives me so many errors :: Something about using an inappropriate header file... void must return int.. and so on...

    Someone plz help...

  13. #13
    ZuK
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    Gives me so many errors :: Something about using an inappropriate header file... void must return int.. and so on...
    You should get used to this kind of error-messages. In the near future you won't find any compiler that compiles this kind of wrong code.
    Kurt

  14. #14
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    Well, in C++, headers only contain .h if they are (taking from someone else's post from who I forgot) non-standard or part of the original C library, and if they're part of the C library you add a "c" the beginning of the header file's name. stdio.h would become cstdio. iostream is part of the standard C++ library, and so it just "iostream". Dev-C++ calls files with .h "antiquitated" or "decaprecated". And errors that are fixed both make the program better and give you more knowledge about C++ in how code should be built.

    EDIT: And yeah, main MUST return an int. When the program exits, main returns a value automatically to the system. Saying main is void violates the returning of the int, resulting in the error, resulting on more knowledge of how code is built.
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  15. #15
    Frequently Quite Prolix dwks's Avatar
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    So, instead of this code
    Code:
    #include<iostream.h>
    
    void main()
    {
    cout << "Hello";
    }
    you should try
    Code:
    #include <iostream>
    
    using namespace std;
    
    int main() {
        cout << "Hello, World!\n";
    }
    dwk

    Seek and ye shall find. quaere et invenies.

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