ctype.h

eC++编译器源码

#pragma ctype

boolean isalpha(const char c);

boolean isupper(const char c);

boolean islower(const char c);

boolean isdigit(const char c);

boolean isxdigit(const char c);

boolean isspace(const char c);

boolean ispunct(const char c);

boolean iscntrl(const char c);

boolean isalnum(const char c);

boolean isprint(const char c);

boolean isgraph(const char c);

boolean isascii(unsigned int c);

char tolower(char c);

char toupper(char c);

char toascii(unsigned int c);