launch applications with spaces?

This is a discussion on launch applications with spaces? within the C++ Programming forums, part of the General Programming Boards category; hey guys, new around here.. My question is how can i run a program with spaces in it using the ...

  1. #1
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    launch applications with spaces?

    hey guys, new around here..

    My question is how can i run a program with spaces in it using the system command

    system("D:\\Unreal Tournament\\System\\unrealtournament.exe");

    Works fine with application which dont have spaces

    thank you

  2. #2
    and the hat of wrongness Salem's Avatar
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    Try

    system("\"D:\\Unreal Tournament\\System\\unrealtournament.exe\"");

  3. #3
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    thanks man that worked great.

    Can you explain me what adding "\" and \" does?

    Just I would like to know for feature refereances

  4. #4
    the hat of redundancy hat nvoigt's Avatar
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    It adds a " character to the start and end of your string, so the OS knows your string doesn't end at the space you put in.
    hth
    -nv

    She was so Blonde, she spent 20 minutes looking at the orange juice can because it said "Concentrate."

    When in doubt, read the FAQ.
    Then ask a smart question.

  5. #5
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    1 more question.

    Usins the same function, how can i lauch applications for a specified location.
    Example:

    I wanna run text.exe located in c:\test\ from the dir c:\test\ and not where the file was compliled

  6. #6
    Skunkmeister Stoned_Coder's Avatar
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    just use a relative path...
    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

  7. #7
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    Originally posted by Stoned_Coder
    just use a relative path...
    what do u mean?

  8. #8
    Skunkmeister Stoned_Coder's Avatar
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    system("\"D:\\Unreal Tournament\\System\\unrealtournament.exe\"");

    that is an example of an absolute path.

    a relative path is so called because it is relative to the directory that you are in. For your apps that normally means their working directory.

    if we were in the directory Unreal Tournament then you could use...

    system("\\System\\unrealtournament.exe");

    That is a relative path. This would fail with a file not found error if you are currently in the wrong directory. It is best to use relative paths in your own code and if things need to be in a subdirectory then do it similar to the above example.
    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

  9. #9
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    ya but, the program I made is a list of programs. The user has a choice of 1-9. Then it launches the program fullpath

    Some dont work since its the wrong start dir. I need to know how i can launch a program from a dir

  10. #10
    Skunkmeister Stoned_Coder's Avatar
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    what directory is the menu prog in?
    what directory are the programs you want to fire up in?
    is the second a subdirectory of the first?
    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

  11. #11
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    Do you really need to use the double \'s in strings?

  12. #12
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    here is a part of the code:

    Code:
    case 3:
    			system("\"D:\\homm3\\heroes3.exe\"");
    			exit(-1);
    			break;
    		case 4:
    			system("\"D:\\homm3\\h3wog.exe\"");
    			exit(-1);
    			break;
    		case 5:
    			system("\"D:\\ee\\Empire Earth.exe\"");
    			exit(-1);
    			break;
    		case 6:
    			system("\"C:\\Program Files\\GameSpy Arcade\\Aphex.exe\"");
    			exit(-1);
    			break;
    as you can see i need all differnt path.s

  13. #13
    Skunkmeister Stoned_Coder's Avatar
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    Then you will have to use absolute paths or better if possible to retrieve the information neede from the registry.
    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

  14. #14
    Skunkmeister Stoned_Coder's Avatar
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    break will have no effect after exit is called because exit will cause your program to cease anyway.
    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

  15. #15
    and the hat of wrongness Salem's Avatar
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    > Do you really need to use the double \'s in strings?
    \ is a special character - \n represents a newline for example

    So
    system( "cd .\new" );
    would mean a directory containing a newline char (not likely)

    To get a real \ into the string, use two of them
    system( "cd .\\new" );

    > break will have no effect after exit is called because exit will cause your program to cease anyway
    This is true, but getting into the habit of always putting break statements in should prevent some headaches caused by code which falls-through when it shouldn't.

    But if exit() is being called in every case, then it should be moved out of the switch statement altogether, since it is common code, and then the break statments are necessary and correct.

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