Zilog ZUSBOPTS - Manual (Page 430)

Standard Header Files UM017105-0511
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Zilog Developer Studio II – ZNEO™
User Manual
Variable Argument List Access Macros and Function
The va_start and va_arg macros described in this section are implemented as macros, not
as real functions. If
#undef is used to remove a macro definition and obtain access to a
real function, the behavior is undefined.
Functions
Input/Output
The < stdio.h > header declares input and output functions.
Macro
Functions
Formatted Input/Output
Character Input/Output
void va_start(va_list ap, parmN); Sets pointer to beginning of argument list.
type va_arg (va_list ap, type); Retrieves argument from list.
void va_end(va_list ap); Resets pointer.
EOF Expands to a negative integral constant. Returned by functions to indi-
cate end of file.
int printf(const char *format, ...); Writes formatted data to stdout.
int scanf(const char *format, ...); Reads formatted data from stdin.
int sprintf(char *s, const char *format, ...); Writes formatted data to string.
int sscanf(const char *s, const char *format, ...); Reads formatted data from string.
int vprintf(const char *format, va_list arg); Writes formatted data to a stdout.
int vsprintf(char *s, const char *format, va_list arg); Writes formatted data to a string.
int getchar(void); Reads a character from stdin.
char *gets(char *s); Reads a line from stdin.
int putchar(int c); Writes a character to stdout.
int puts(const char *s); Writes a line to stdout.