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Scan input from a character string
#include <stdio.h>
int sscanf( const char* in_string,
const char* format,
... );
- in_string
- The string that you want to read from.
- format
- A string that specifies the format of the input.
For more information, see
scanf().
The formatting string determines what additional arguments you need to
provide.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
The sscanf() function scans input from the character string
in_string, under control of the argument format.
Following the format string is the list of addresses of items to
receive values.
The number of input arguments for which values were
successfully scanned and stored, or EOF when the scanning
is terminated by reaching the end of the input string.
#include <stdio.h>
#include <stdlib.h>
int main( void )
{
int day, year;
char weekday[20], month[20];
sscanf( "Thursday February 0025 1999",
"%s %s %d %d",
weekday, month, &day, &year );
printf( "%s %d, %d is a %s\n",
month, day, year, weekday );
return EXIT_SUCCESS;
}
produces the following:
February 25, 1999 is a Thursday
ANSI,
POSIX 1003.1
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
Read the Caveats |
Thread |
Yes |
It's safe to call this function in a signal handler if the data isn't
floating point.
fscanf(),
fwscanf(),
scanf(),
swscanf(),
vfscanf(),
vfwscanf(),
vscanf(),
vsscanf(),
vswscanf(),
vwscanf(),
wscanf()
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