Why I don't get any output? Post: 302089084

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Top Forums Programming Why I don't get any output? Post 302089084 by jim mcnamara on Saturday 16th of September 2006 08:49:41 PM

09-16-2006

Registered User

You are confusing something called a "scanset" with what sscanf is doing in your example. A scanset is a CLASS of characters, for example, all lowercase:

Code:

/* sscanftest.c*/
int main()
{
	char	mystring[256];
	printf("Enter a string in lower case ");
	scanf("%[ a-z]",mystring); /* allow space character and all lc letters */
	printf("The string was ||%s||\n",mystring);
	return 0;
}

Here is what you get:

Quote:

$ sscanftest
Enter a string in lower case hello world
The string was ||hello world||
$ sscanftest
Enter a string in lower case hello, unix world
The string was ||hello||
$ sscanftest
Enter a string in lower case abcd1234
The string was ||abcd||
$

Notice:
1. the scanset does not look for a particular string like "model name"
scansets filter in (or out with ^ as the first character) desired characters.

2. it stops scanning when it hits a character not in the scanset - like the comma

In other words, sscanf does not do what you want it to do - look for a given string.
Your syntax should be "%[ <scanset goes here> ]".

Bottom line -- the strstr answer you already got works. scansets are not the
desired way to go here. HTH

jim mcnamara

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tcl_unichartolower

Tcl_UtfToUpper(3)					      Tcl Library Procedures						 Tcl_UtfToUpper(3)

__________________________________________________________________________________________________________________________________________________

NAME

       Tcl_UniCharToUpper,  Tcl_UniCharToLower, Tcl_UniCharToTitle, Tcl_UtfToUpper, Tcl_UtfToLower, Tcl_UtfToTitle - routines for manipulating the
       case of Unicode characters and UTF-8 strings

SYNOPSIS

       #include <tcl.h>

       Tcl_UniChar
       Tcl_UniCharToUpper(ch)

       Tcl_UniChar
       Tcl_UniCharToLower(ch)

       Tcl_UniChar
       Tcl_UniCharToTitle(ch)

       int
       Tcl_UtfToUpper(str)

       int
       Tcl_UtfToLower(str)

       int
       Tcl_UtfToTitle(str)

ARGUMENTS

       int ch (in)	       The Tcl_UniChar to be converted.

       char *str (in/out)      Pointer to UTF-8 string to be converted in place.
_________________________________________________________________

DESCRIPTION

       The first three routines convert the case of individual Unicode characters:

       If ch represents a lower-case character, Tcl_UniCharToUpper returns the corresponding upper-case character.  If no upper-case character	is
       defined, it returns the character unchanged.

       If ch represents an upper-case character, Tcl_UniCharToLower returns the corresponding lower-case character.  If no lower-case character is
       defined, it returns the character unchanged.

       If ch represents a lower-case character, Tcl_UniCharToTitle returns the corresponding title-case character.  If no title-case character	is
       defined,  it  returns  the  corresponding upper-case character.	If no upper-case character is defined, it returns the character unchanged.
       Title-case is defined for a small number of characters that have a different appearance when they are at the  beginning	of  a  capitalized
       word.

       The next three routines convert the case of UTF-8 strings in place in memory:

       Tcl_UtfToUpper  changes every UTF-8 character in str to upper-case.  Because changing the case of a character may change its size, the byte
       offset of each character in the resulting string may differ from its original location.	Tcl_UtfToUpper writes a null byte at  the  end	of
       the  converted  string.	 Tcl_UtfToUpper returns the new length of the string in bytes.	This new length is guaranteed to be no longer than
       the original string length.

       Tcl_UtfToLower is the same as Tcl_UtfToUpper except it turns each character in the string into its lower-case equivalent.

       Tcl_UtfToTitle is the same as Tcl_UtfToUpper except it turns the first character in the string into its title-case equivalent and all  fol-
       lowing characters into their lower-case equivalents.

BUGS

       At  this  time,	the  case  conversions are only defined for the ISO8859-1 characters.  Unicode characters above 0x00ff are not modified by
       these routines.

KEYWORDS

       utf, unicode, toupper, tolower, totitle, case

Tcl									8.1							 Tcl_UtfToUpper(3)