| Function/Macro | #include file | ANSI/ISO | ANSI/ISO 93 | POSIX | XPG4 | Extension | Subsystem |
| <stdlib.h> | X | ||||||
| perror | <stdio.h> | X | X | X | |||
| pow | <math.h> | X | X | X | |||
| printf | <stdio.h> | X | X | X | X | X | |
| putc | <stdio.h> | X | X | X | |||
| _putch | <conio.h> | X | |||||
| putchar | <stdio.h> | X | X | X | |||
| putenv | <stdlib.h> | X | X | ||||
| puts | <stdio.h> | X | X | X | |||
| putwc | <wchar.h> | X X |
X X |
||||
| putwchar | <wchar.h> | X | X | ||||
| qsort | <stdlib.h> <search.h> |
X | X | X | X | X |
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IBM C and C++ Compilers Functions and
Macros