std::tolower
From cppreference.com
Defined in header
<cctype>
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int tolower( int ch );
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Converts the given character to lowercase according to the character conversion rules defined by the currently installed C locale.
In the default "C" locale, the following uppercase letters ABCDEFGHIJKLMNOPQRSTUVWXYZ
are replaced with respective lowercase letters abcdefghijklmnopqrstuvwxyz
.
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[edit] Parameters
ch | - | character to be converted. If the value of ch is not representable as unsigned char and does not equal EOF, the behavior is undefined
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[edit] Return value
Lowercase version of ch
or unmodified ch
if no lowercase version is listed in the current C locale.
[edit] Example
Run this code
#include <iostream> #include <cctype> #include <clocale> int main() { unsigned 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
[edit] See also
converts a character to uppercase (function) |
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converts a character to lowercase using the ctype facet of a locale (function template) |
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converts a wide character to lowercase (function) |
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C documentation for tolower
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