преобразование входного формата (input format conversion)
Синопсис (Synopsis)
#include <stdio.h>
int scanf(const char *restrict format, ...);
int fscanf(FILE *restrict stream,
const char *restrict format, ...);
int sscanf(const char *restrict str,
const char *restrict format, ...);
#include <stdarg.h>
int vscanf(const char *restrict format, va_list ap);
int vfscanf(FILE *restrict stream,
const char *restrict format, va_list ap);
int vsscanf(const char *restrict str,
const char *restrict format, va_list ap);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
vscanf(), vsscanf(), vfscanf():
_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
