Updated: April 19, 2023 |
Scan input from standard input (varargs)
#include <stdio.h> #include <stdarg.h> int vscanf( const char * format, va_list args );
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The vscanf() function scans input from stdin, under control of the argument format. For information about the format string, see the description of scanf().
The vscanf() function is a varargs version of scanf().
The number of input arguments for which values were successfully scanned and stored, or EOF when the scanning is stopped by reaching the end of the input stream before storing any values.
If an error occurs, errno indicates the type of error.
#include <stdio.h> #include <stdlib.h> #include <stdarg.h> void ffind( char *format, ... ) { va_list arglist; va_start( arglist, format ); vscanf( format, arglist ); va_end( arglist ); } int main( void ) { int day, year; char weekday[10], month[12]; ffind( "%10s %12s %d %d", weekday, month, &day, &year ); printf( "\n%s, %s %d, %d\n", weekday, month, day, year ); return EXIT_SUCCESS; }
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | No |
Thread | Yes |