| Function/Macro | #include file | ANSI/ISO | ANSI/ISO 93 | POSIX | XPG4 | Extension | Subsystem |
| iconv | <iconv.h> | X | |||||
| iconv_close | <iconv.h> | X | |||||
| iconv_open | <iconv.h> | X | |||||
| _inp | <conio.h> <builtin.h> |
X X |
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| _inpd | <conio.h> <builtin.h> |
X X |
|||||
| _inpw | <conio.h> <builtin.h> |
X X |
|||||
| _interrupt | <stdlib.h> <builtin.h> |
X X |
|||||
| isalnum | <ctype.h> | X | X | X | |||
| isalpha | <ctype.h> | X | X | X | |||
| isascii | <ctype.h> | X | X | ||||
| isatty | <io.h> | X | X | X | |||
| isblank | <ctype.h> | X | |||||
| iscntrl | <ctype.h> | X | X | X | |||
| _iscsym | <ctype.h> | X | |||||
| _iscsymf | <ctype.h> | X | |||||
| isdigit | <ctype.h> | X | X | X | |||
| isgraph | <ctype.h> | X | X | X | |||
| islower | <ctype.h> | X | X | X | |||
| isprint | <ctype.h> | X | X | X | |||
| ispunct | <ctype.h> | X | X | X | |||
| isspace | <ctype.h> | X | X | X | |||
| isupper | <ctype.h> | X | X | X | |||
| iswalnum | <wctype.h> | X | X | X | |||
| iswalpha | <wctype.h> | X | X | X | |||
| iswblank | <wctype.h> | X | |||||
| iswcntrl | <wctype.h> | X | X | X | |||
| iswctype | <wctype.h> | X | X | X | |||
| iswdigit | <wctype.h> | X | X | X | |||
| iswgraph | <wctype.h> | X | X | X | |||
| iswlower | <wctype.h> | X | X | X | |||
| iswprint | <wctype.h> | X | X | X | |||
| iswpunct | <wctype.h> | X | X | X | |||
| iswspace | <wctype.h> | X | X | X | |||
| iswupper | <wctype.h> | X | X | X | |||
| iswxdigit | <wctype.h> | X | X | X | |||
| isxdigit | <ctype.h> | X | X | X | |||
| _itoa | <stdlib.h> | X | X |
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IBM C and C++ Compilers Functions and
Macros