Error Using fpurge(stdin);

Question

Here is the Part of the program that i am trying to compile using gcc compiler on ubuntu 14.04.

#include<stdio.h>
#include<string.h>

main() {
    int i;
    char str[50], pat[3];
    char sep;
    printf("Enter the sting to seperate\n ");
    scanf("%s", str);
    fpurge(stdin);
    printf("Enter the patern in Numbers to seperate Example : 1 2 3\n");
    //__fpurge(stdin);
    scanf("%s", pat);
    fpurge(stdin);
    printf("Enter the seperator Example: ; or enter ,space");
    scanf("%c", &sep);
}

this is the Error:

 /tmp/cc0bHLkO.o: In function `main':
 str_sepert.c:(.text+0x4d): undefined reference to `fpurge'
 str_sepert.c:(.text+0x95): undefined reference to `fpurge'
 collect2: error: ld returned 1 exit status

Answer 1

fpurge is not in the standard C library. It is nonstandard and not portable. It is a BSD function.

http://bytes.com/topic/c/answers/845246-fpurge