tolower
From cppreference.com
| Defined in header
<ctype.h>
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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 <stdio.h> #include <ctype.h> #include <locale.h> int main() { unsigned char c = '\xb4'; // the character Ž in ISO-8859-15 // but ´ (acute accent) in ISO-8859-1 unsigned char c2 = c; // for printing setlocale(LC_ALL, "en_US.iso88591"); printf("in iso8859-1, tolower('0x%x') gives 0x%x\n", c2, tolower(c)); setlocale(LC_ALL, "en_US.iso885915"); printf("in iso8859-15, tolower('0x%x') gives 0x%x\n", c2, tolower(c)); }
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 wide character to lowercase (function) |
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C++ documentation for tolower
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