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Annotation of coherent/a/usr/man/ALL/fscanf, revision 1.1.1.1

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                      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.
                     28: 
                     29: 
                     30: #include <stdio.h>
                     31: 
                     32: main ()
                     33: {
                     34:         FILE *fp;
                     35:         char let[4];
                     36: 
                     37: 
                     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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