fscanf Function

Scans formatted text from a stream.

Include

<stdio.h>

Prototype

int fscanf(FILE *stream, const char *format, ...);

Arguments

Return Value

Returns the number of items successfully converted and assigned. If no items are assigned, a 0 is returned. EOF is returned if end-of-file is encountered before the first conversion or if an error occurs.

Remarks

The format argument has the same syntax and use that it has in scanf.

Example

#include <stdio.h> /* for fopen, fscanf,   */
                   /* fclose, fprintf,     */
                   /* fseek, printf, FILE, */
                   /* NULL, SEEK_SET       */

int main(void)
{
  FILE *myfile;
  char s[30];
  int x;
  char a;
  if ((myfile = fopen("afile", "w+")) == NULL)
    printf("Cannot open afile\n");
  else
  {
    fprintf(myfile, "%s %d times%c", 
            "Print this string", 100, '\n');

    fseek(myfile, 0L, SEEK_SET);

    fscanf(myfile, "%s", s);
    printf("%s\n", s);
    fscanf(myfile, "%s", s);
    printf("%s\n", s);
    fscanf(myfile, "%s", s);
    printf("%s\n", s);
    fscanf(myfile, "%d", &x);
    printf("%d\n", x);
    fscanf(myfile, "%s", s);
    printf("%s\n", s);
    fscanf(myfile, "%c", a);
    printf("%c\n", a);

    fclose(myfile);
  }
}

Example Input

Contents of afile:

Print this string 100 times

Example Output

Print
this
string
100
times