<cctype>
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
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