output file is a unicode file under certain circumstances

This is a discussion on output file is a unicode file under certain circumstances within the C Programming forums, part of the General Programming Boards category; My program creates an output file based on the user's input. The user enters a pronoun, and the pronoun gets ...

  1. #1
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    output file is a unicode file under certain circumstances

    My program creates an output file based on the user's input. The user enters a pronoun, and the pronoun gets placed into the output file. Each time the program runs, the user enters additional pronouns which get appended to the output file. I noticed that whenever the user enters "i" as the first pronoun in the file, the file is a unicode file. Whenever the user enters any other pronoun, the file is an ANSI file. I need the files to consistently be ANSI files. What can i do to prevent files which begin with "i" from being unicode files?

  2. #2
    and the hat of wrongness Salem's Avatar
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    Without seeing your code, or knowing which OS/Compiler you're using, how would we even make a guess?
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

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    here is the code. i am using a c compiler provided by the Code Blocks program.

    Code:
    tensecomp = strncmp (past, tense, 2);
    verbcount = count;
    
    strncpy (filename2, username, length);
    strcat (filename2, "pasttenseverbs.txt");
    strncpy (filename5, username, length);
    strcat (filename5, "pronounp.txt");
    if (tensecomp ==0){
        outfile = fopen (filename5, "a");
            for (counter =0; answerfuture != 'n'; counter=counter +1){
            printf ("\n\nFor which pronoun did you learn past tense?");
            printf (" You may answer \ni for I\nyouf for you female\nyoum for you male\nhe for he\n");
        printf ("she for she\ntheyf for they female\ntheym for they males\nyoupg for you plural girls\nyoupb for you plural boys\n");
            scanf ("%s", & shemhagufp[counter]);
                comparison_vuv_f = strcmp ("theyf", shemhagufp[counter]);
                comparison_vuv_m = strcmp ("theym", shemhagufp[counter]);
                comparison_he_past = strcmp ("he", shemhagufp[counter]);
                comparison_she_past = strcmp ("she", shemhagufp [counter]);
                comparison_i_past = strcmp ("i", shemhagufp [counter]);
                if ((comparison_vuv_f==0) || (comparison_vuv_m ==0)|| (comparison_he_past ==0) || (comparison_she_past==0) || (comparison_i_past ==0) ){
                    printf ("Did you teach the VUV HAMEHAPEICH with this SHEM HAGUF ?\n Type y for yes and n for no.");
                    scanf (" %c", &vuvhamehapeich);
                        if (vuvhamehapeich=='y')
                        strcat (shemhagufp[counter], "and");
                        printf ("%s\n", shemhagufp[counter]);
                    }
            fprintf (outfile, "%s ", shemhagufp[counter]);
            printf ("\ndo you want to enter another shemhaguf?");
            printf ("\nenter y for yes and n for no.\n Use lowercase only.\n");
            scanf (" %c", &answerfuture);
                        }
            fclose (outfile);
    }
    THANKS!

  4. #4
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    If your user puts an "i" as the first character, it will put "i " (trailing space) into the first position in the file... but that doesn't make it unicode. In a unicode file, containing the english alphabet every second byte will be a 0, not a space.

  5. #5
    and the hat of wrongness Salem's Avatar
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    >What can i do to prevent files which begin with "i" from being unicode files?
    Verify that you can create such a file with a real simple 5-line program.
    - open file
    - write "i"
    - close the file
    Is it a UNICODE file?

    If not, there is some weirdness in your code, and nothing to do with the actual content.

    I notice that you're using strn functions in some places. Note that these do not automatically append a \0, so you might have trailing garbage which might be interpreted as being UNICODE.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

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