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<cctype>

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Includes the Standard C library header <ctype.h> and adds the associated names to the std namespace.

Requirements

Header: <cctype>

Namespace: std

Remarks

Including this header ensures that the names declared using external linkage in the Standard C library header are declared in the std namespace.

Functions

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);

See also

Header Files Reference
C++ Standard Library Overview
Thread Safety in the C++ Standard Library