How to get same result in C or C++ same as toLowerCase in Java or string.lower() in Python? -


i need c or c++ function(or library) works string.tolowercase() in java.

i know can use tolower() english, need function (or library) can cover global language. (actually, needs cover 9 languages listed below.)

language list

 dutch english french german italian portuguese russian spanish ukrainian

add, these characters in first line below input , second line expected result

line 1: 

aÁÀÂÄĂĀÃÅÆbcĆČÇdeÉÈÊËĚĘfghℏiÍÌÎÏjklŁmnŃŇÑoÓÒÔÖÕØŒpqrŘsŚŠŞtŢuÚÙÛÜŪvwxyÝzŹŽΑΔΕΘΛΜΝΠΡΣΣΦΩАБВГҐДЕЁЄЖЗИЙІЇКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯ

line 2: 

aáàâäăāãåæbcćčçdeéèêëěęfghℏiíìîïjklłmnńňñoóòôöõøœpqrřsśšştţuúùûüūvwxyýzźžαδεθλμνπρσςφωабвгґдеёєжзийіїклмнопрстуфхцчшщъыьэюя

i verified results java tolowercase() , python string.lower() , both correct.

is there way translate lowercase letter in c or c++?

and important thing letters read file encoded 'utf-8'!

please me. english not good, please use simple english as can.

i think find need in boost libraries - see http://www.boost.org/doc/libs/1_51_0/libs/locale/doc/html/conversions.html

quoting website:

boost.locale gives powerful tools development of cross platform localized software - software talks user in language.

provided features:

correct case conversion, case folding , normalization. collation (sorting), including support 4 unicode collation levels. ....

you idea, hope. function need is

boost::locale::to_lower(yourutf8string)

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