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std::tolower

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< cpp‎ | string‎ | byte
Revision as of 23:25, 31 May 2013 by P12bot (Talk | contribs)

Defined in header <cctype>
int tolower( int ch );

Converts the given character to lowercase according to the character conversion rules defined by the currently installed C locale.

Contents

Parameters

ch - character to be converted

Return value

Lowercase version of ch or unmodified ch if no lowercase version is listed in the current C locale.

Example

#include <iostream>
#include <cctype>
#include <clocale>
 
int main()
{
    char c = '\xb4'; // the character Ž in ISO-8859-15
                     // but ´ (acute accent) in ISO-8859-1 
 
    std::setlocale(LC_ALL, "en_US.iso88591");
    std::cout << std::hex << std::showbase;
    std::cout << "in iso8859-1, tolower('0xb4') gives "
              << std::tolower(c) << '\n';
    std::setlocale(LC_ALL, "en_US.iso885915");
    std::cout << "in iso8859-15, tolower('0xb4') gives "
              << std::tolower(c) << '\n';
}

Output:

in iso8859-1, tolower('0xb4') gives 0xb4
in iso8859-15, tolower('0xb4') gives 0xb8

See also

converts a character to uppercase
(function) [edit]
converts a character to lowercase using the ctype facet of a locale
(function template) [edit]
converts a wide character to lowercase
(function) [edit]
C documentation for tolower