Execute any DOS command through C program on VC++ compiler in windows2000professional

This is a discussion on Execute any DOS command through C program on VC++ compiler in windows2000professional within the C Programming forums, part of the General Programming Boards category; hi all, I am beginner in C, I want to execute any DOS command like "cd <directory Name>" "dir" "cls" ...

  1. #1
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    Execute any DOS command through C program on VC++ compiler in windows2000professional

    hi all,

    I am beginner in C, I want to execute any DOS command like
    "cd <directory Name>"
    "dir"
    "cls" etc..... Through C program.

    Please any can help me .

    Thanz in advance.

  2. #2
    {Jaxom,Imriel,Liam}'s Dad Kennedy's Avatar
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    You _Could_ do this, but there exists functions for EACH of these in several libs. . . Calling an external program from within your code is generaly considered to be "bad."

  3. #3
    Fountain of knowledge.
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    Have you tried something like the system command?
    eg.

    system("dir");
    system("cd"); etc...

    http://www.thinkage.ca/english/gcos/...ib/system.html

  4. #4
    Fear the Reaper...
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    As stated, you could use the system() command but that's sort of OS dependant.
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    system() can also be dangerous. Imagine if someone mapped "cls" to "bad_trojan-2.5.exe" on some computer.
    Code:
    #include <stdio.h>
    
    void J(char*a){int f,i=0,c='1';for(;a[i]!='0';++i)if(i==81){
    puts(a);return;}for(;c<='9';++c){for(f=0;f<9;++f)if(a[i-i%27+i%9
    /3*3+f/3*9+f%3]==c||a[i%9+f*9]==c||a[i-i%9+f]==c)goto e;a[i]=c;J(a);a[i]
    ='0';e:;}}int main(int c,char**v){int t=0;if(c>1){for(;v[1][
    t];++t);if(t==81){J(v[1]);return 0;}}puts("sudoku [0-9]{81}");return 1;}

  6. #6
    {Jaxom,Imriel,Liam}'s Dad Kennedy's Avatar
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    Hence how it is considered to be "bad."

  7. #7
    and the hat of wrongness Salem's Avatar
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    Aside from that, system("cd foo"); does NOT change the directory of the program itself, much to the surprise of newbies.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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  8. #8
    Frequently Quite Prolix dwks's Avatar
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    The POSIX function chdir() does, however.
    dwk

    Seek and ye shall find. quaere et invenies.

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  9. #9
    Super Moderator VirtualAce's Avatar
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    Didn't we kill the DOS board?

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