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Annotation of coherent/a/usr/man/ALL/fscanf, revision 1.1

1.1     ! root        1: 
        !             2: 
        !             3: fscanf()                      STDIO                      fscanf()
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        !             8: Format input from a file stream
        !             9: 
        !            10: #include <stdio.h>
        !            11: iinntt ffssccaannff(_f_p, _f_o_r_m_a_t, _a_r_g_1, ... _a_r_g_N)
        !            12: FFIILLEE *_f_p; cchhaarr *_f_o_r_m_a_t;
        !            13: [_d_a_t_a _t_y_p_e] *_a_r_g_1, ... *_a_r_g_N;
        !            14: 
        !            15: fscanf  reads the  file stream  pointed  to by  fp, and  uses the
        !            16: string format to format  the arguments arg1 through argN, each of
        !            17: which must point to a variable of the appropriate data type.
        !            18: 
        !            19: fscanf returns either the  number of arguments matched, or EOF if
        !            20: no arguments matched.
        !            21: 
        !            22: For more information on fscanf's conversion codes, see scanf.
        !            23: 
        !            24: ***** Example *****
        !            25: 
        !            26: The  following example  uses ffpprriinnttff  to write  some data  into a
        !            27: file, and then reads it back using ffssccaannff.
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        !            29: 
        !            30: #include <stdio.h>
        !            31: 
        !            32: main ()
        !            33: {
        !            34:         FILE *fp;
        !            35:         char let[4];
        !            36: 
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        !            38: 
        !            39:         /* open file into write/read mode */
        !            40:         if ((fp = fopen("tmpfile", "wr")) == NULL) {
        !            41:                 printf("Cannot open 'tmpfile'\n");
        !            42:                 exit(1);
        !            43:         }
        !            44: 
        !            45: 
        !            46: 
        !            47:         /* write a string of chars into file */
        !            48:         fprintf(fp, "1234");
        !            49: 
        !            50: 
        !            51: 
        !            52:         /* move file pointer back to beginning of file */
        !            53:         rewind(fp);
        !            54: 
        !            55: 
        !            56: 
        !            57:         /* read and print data from file */
        !            58:         fscanf(fp, "%c %c %c %c",
        !            59:                 &let[0], &let[1], &let[2], &let[3]);
        !            60:         printf("%c %c %c %c\n",
        !            61:                 let[3], let[2], let[1], let[0]);
        !            62: 
        !            63: 
        !            64: COHERENT Lexicon                                           Page 1
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        !            68: 
        !            69: fscanf()                      STDIO                      fscanf()
        !            70: 
        !            71: 
        !            72: 
        !            73: }
        !            74: 
        !            75: 
        !            76: ***** See Also *****
        !            77: 
        !            78: scanf(), sscanf(), STDIO
        !            79: 
        !            80: ***** Notes *****
        !            81: 
        !            82: Because C does not perform type checking, it is essential that an
        !            83: argument match  its specification.   For that reason,   fscanf is
        !            84: best used  only to process data  that you are certain  are in the
        !            85: correct  data format,  such as data  previously written  out with
        !            86: fprintf.
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        !           130: COHERENT Lexicon                                           Page 2
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