Standard library header <cctype>
From cppreference.com
C++
Standard library headers
This header was originally in the C standard library as <ctype.h> .
This header is part of the null-terminated byte strings library.
Functions |
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checks if a character is alphanumeric
(function) |
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checks if a character is alphabetic
(function) |
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checks if a character is lowercase
(function) |
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checks if a character is an uppercase character
(function) |
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checks if a character is a digit
(function) |
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checks if a character is a hexadecimal character
(function) |
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checks if a character is a control character
(function) |
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checks if a character is a graphical character
(function) |
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checks if a character is a space character
(function) |
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(C++11)
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checks if a character is a blank character
(function) |
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checks if a character is a printing character
(function) |
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checks if a character is a punctuation character
(function) |
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converts a character to lowercase
(function) |
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converts a character to uppercase
(function) |
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Synopsis
namespace std { int isalnum(int c); int isalpha(int c); int isblank(int c); int iscntrl(int c); int isdigit(int c); int isgraph(int c); int islower(int c); int isprint(int c); int ispunct(int c); int isspace(int c); int isupper(int c); int isxdigit(int c); int tolower(int c); int toupper(int c); }