04-23-2018
Hi pranabpal,
The code Scrutinizer has suggested seems to match your description of your problem.
But it doesn't produce the output you say you want with the sample input you provided. Why is it that your sample output converted the upper-case characters in the first two command-line operands to lower-case before printing them when there is no mention of performing any conversions in the description of your problem?
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LEARN ABOUT MOJAVE
tcl_unichartoupper
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)