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C251 User's Guide

C251 Introduction Compiling Programs Language Extensions Preprocessor Advanced Programming Error Messages Library Reference Library Files Source Code Standard Types jmp_buf va_list Macros CBYTE CVAR CARRAY DARRAY DBYTE DVAR HARRAY HBYTE HVAR NARRAY NBYTE NVAR XARRAY XBYTE XVAR Routines by Category Buffer Manipulation Routines Character Routines Data Conversion Routines Intrinsic Routines Math Routines Memory Allocation Routines Stream I/O Routines String Routines Variable Length Argument Routines Miscellaneous Routines Include Files SFR Definitions absacc.h assert.h ctype.h float.h intrins.h limits.h math.h setjmp.h stdarg.h stddef.h stdio.h stdlib.h string.h Reference _chkdouble_ _chkfloat_ _crol_ _cror_ _getkey _irol_ _iror_ _lrol_ _lror_ _nop_ _testbit_ _tolower _toupper abs acos asin assert atan atan2 atof atoi atol cabs calloc ceil cos cosh exp fabs fcalloc ffree finit_mempool floor fmalloc fmemcpy fmemset frealloc free getchar gets hmemccpy hmemchr hmemcmp hmemcpy hmemmove hmemset hstrcmp hstrcpy hstrlen hstrncpy init_mempool isalnum isalpha iscntrl isdigit isgraph islower isprint ispunct isspace isupper isxdigit labs log log10 longjmp malloc memccpy memchr memcmp memcpy memmove memset modf offsetof pow printf putchar puts rand realloc scanf setjmp sin sinh sprintf sqrt srand sscanf strcat strchr strcmp strcpy strcspn strlen strncat strncmp strncpy strpbrk strpos strrchr strrpbrk strrpos strspn tan tanh toascii toint tolower toupper ungetchar va_arg va_end va_start vprintf vsprintf xcalloc xfree xinit_mempool xmalloc xmemcpy xmemset xrealloc Appendix

sscanf

Summary
#include <stdio.h>

int sscanf (
  char *buffer,           /* scanf input buffer */
  const char *fmtstr      /* format string */
  〚, arguments...〛);    /* additional arguments */
Description

The sscanf function reads data from the string buffer. Data input are stored in the locations specified by argument according to the format string fmtstr. Each argument must be a pointer to a variable that corresponds to the type defined in fmtstr. The type specified in fmtstr controls the interpretation of the input data. The fmtstr may be composed of one or more whitespace characters, non-whitespace characters, and format specifications, as defined in the scanf function description.

Return Value

The sscanf function returns the number of input fields that were successfully converted. An EOF is returned if an error is encountered.

See Also

gets, puts, sprintf, vprintf, vsprintf

Example
#include <stdio.h>

void tst_sscanf (void) {
  char a;
  int b;
  long c;

  unsigned char x;
  unsigned int y;
  unsigned long z;

  float f,g;

  char d, buf [10];

  int argsread;

  printf ("Reading a signed byte, int,and long\n");
  argsread = sscanf ("1 -234 567890",
                     "%bd %d %ld",
                     &a, &b, &c);
  printf ("%d arguments read\n", argsread);

  printf ("Reading an unsigned byte, int, and long\n");
  argsread = sscanf ("2 44 98765432",
                     "%bu %u %lu",
                     &x, &y, &z);
  printf ("%d arguments read\n", argsread);

  printf ("Reading a character and a string\n");
  argsread = sscanf ("a abcdefg",
                     "%c %9s",
                     &d, buf);
  printf ("%d arguments read\n", argsread);

  printf ("Reading two floating-point numbers\n");
  argsread = sscanf ("12.5 25.0",
                     "%f %f",
                     &f, &g);
  printf ("%d arguments read\n", argsread);
}
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