Starting a new program

This is a discussion on Starting a new program within the C++ Programming forums, part of the General Programming Boards category; In a console based application, how do you run a new program without closing the original. For example I open ...

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    Question Starting a new program

    In a console based application, how do you run a new program without closing the original. For example I open a console version of microsofts "run". The program opens the new program you type in.

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    You mean like the system() call?

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    No, I mean, in a program you could have something like

    Code:
    open(a_different_program.exe);
    and the other program would appear on the screen.

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    Correct me if I'm wrong, but I'm pretty sure that's what the system() call does... if you want a console application to open in a new window, you'll have to do something like pass cmd.exe the name of the console application as an argument.

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    Could you give me an example.

    I thought system could only be used toaccess things like "ping" that are commonly used in command prompt. I also read elsewere on this forum that system(); isn't a good command to use.

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    I think you may be wanting ShellExecute(), which to my knowledge is similar to system()? I don't quite know, however I do know you can do this:

    Code:
    #include <windows.h>  // ShellExecute()
    
    ...
    	// The below line will open your homepage in Firefox if it's installed
    	ShellExecute(NULL, "open", "C:\\Program Files\\Mozilla Firefox\\firefox.exe", NULL, NULL, NULL);
    ...
    To my knowledge, again which may be wrong, system() echos as if you went to start->run->cmd and you typed the text in. ( Which can probably open a new process too, if that's what you are wanting )

    Also, if you are wanting to create a process and control it, that's a whooooooooole nother story.
    Last edited by tjpanda; 10-12-2007 at 12:16 AM. Reason: Fixed "...\firefox.exe" to "...\\firefox.exe"

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    Whilst system() is the most portable (although not very portable), it is also the least safe.

    http://faq.cprogramming.com/cgi-bin/...&id=1043284392
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    I didn't get an error, but I also didn't get any effect from the shell execute(); command.

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    Can you post the code you used the ShellExecute with?

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    >I also read elsewere on this forum that system(); isn't a good command to use.
    system() is a perfectly good function to use. It's bad when it's misused (for example, using it to call things like "pause" when you can simply use getchar() ).

    >To my knowledge, again which may be wrong, system() echos as if you went to start->run->cmd and you typed the text in.
    It's been awhile since I used Windows, but I'm pretty sure that typing a Win32 program at the prompt will open it the way it's supposed to execute, but then again, I could be wrong. I know this works on Mac and Linux.

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    Quote Originally Posted by histevenk View Post
    I didn't get an error, but I also didn't get any effect from the shell execute(); command.
    Did you remember to escape backslashes in the path?

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    Code:
     
    ShellExecute(NULL, "open", "1.exe", NULL, NULL, NULL);

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    You should change "1.exe" to the path of 1.exe. For example, if 1.exe resided in C:\ you would need to use:

    Code:
    ShellExecute(NULL, "open", "C:\\1.exe", NULL, NULL, NULL);

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    Give me a second to read through this. Thanks

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    Code:
     
    ShellExecute(NULL, "open", "C:\\Dev-Cpp\\me\\1.exe", NULL, NULL, NULL);
    The program is still not opening and I get the following error
    196
    C:\Dev-Cpp\Me\dos.cpp
    [Warning] passing NULL used for non-pointer converting 6 of `HINSTANCE__* ShellExecuteA(HWND__*, const CHAR*, const CHAR*, const CHAR*, const CHAR*, INT)'

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