ctype.h

来自「eC++编译器源码」· C头文件 代码 · 共 32 行

#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);