copy?

This is a discussion on copy? within the C++ Programming forums, part of the General Programming Boards category; I asked about the mkdir command for dos, now I wanna know if it's possible to copy the file's. like ...

  1. #1
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    copy?

    I asked about the mkdir command for dos, now I wanna know if it's possible to copy the file's. like the command copy in dos. If it is please fill me in on what it is.
    Thanks
    -Kavity
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  2. #2
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    With fopen you can open files for reading and/or writing.

    Open your source-file for reading and your destination-file for writing and use for example fgetc and fputc to get a byte from the source-file and to put it in the destination-file.

    After that you can use fclose to close both files.

    Perhaps this little piece of code may help.

    FILE *in, *out;
    unsigned char byte;
    in = fopen ("myinfile.dat", "rb");
    out = fopen ("myoutfile.dat", "rw");
    while (!feof (in))
    {
    byte = (unsigned char) fgetc (in);
    fputc ((int) byte, out);
    }
    fclose (in);
    fclose (out);

  3. #3
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    Unhappy Hmm,

    Thanks, but I'd rather not have to use fopen. Is there any other way to do it?
    -Kavity
    i'm not stupid, just a little short on brains.
    Kav's game!
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  4. #4
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    In forum C Programming, topic File reading and writing, there Prelude gives some alternatives to this. I suggest you take a look at those.

    Why won't you use fopen?

  5. #5
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    Won't use fopen?

    I don't really want to use fopen. The code is already almost written, it makes the directorys. And it's all done by using ofstream. And if I was to use fopen I would have to rewrite the code. I may do that later on, but for now I'm just wondering. Thanks anyways.
    -Kavity
    p.S.: I'll check that out.
    i'm not stupid, just a little short on brains.
    Kav's game!
    Featuring:
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  6. #6
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    if you use the system(char * ) command, you can make any msdos calls you want to and call copy yourself.
    Code:
    system("copy file1.txt newfolder\\file1.txt");
    That would call the msdos system call copy, and copy file to newfolder.

  7. #7
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    Copying is quite simple really:
    Code:
    #include <fstream>
    
    using namespace std;
    
    void copy(const char* from, const char* to) {
        ifstream in(from);
        ofstream out(to);
        out << in.rdbuf();
        in.close();
        out.close();
    }
    
    int main() {
        copy("myfile1.txt", "myfile2.txt");
    }
    Of course it lacks error handling code, but generally that's all there is.
    - lmov

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