fscanf()

scan input from a file

Synopsis:

#include <stdio.h>
int fscanf( FILE *fp, const char *format, ... );

Description:

The fscanf() function scans input from the file designated by fp, under control of the argument format. Following the format string is a list of addresses to receive values. The format string is described under the description of the scanf() function.

Returns:

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 stream. When a file input error occurs, errno may be set.

Examples:

To scan a date in the form "Saturday April 18 1987":

#include <stdio.h>

void main()
  {
    int day, year;
    char weekday[10], month[10];
    FILE *in_data;

    in_data = fopen( "file", "r" );
    if( in_data != NULL ) {
      fscanf( in_data, "%s %s %d %d",
          weekday, month, &day, &year );
      printf( "Weekday=%s Month=%s Day=%d Year=%d\n",
          weekday, month, day, year );
      fclose( in_data );
    }
  }

Classification:

ANSI

See also:

cscanf(), errno, scanf(), sscanf(), vcscanf(), vfscanf(), vscanf(), vsscanf()