string manipulation

[bigzeppelin2k]

I'm looking for a small piece of code or a function that takes a string as input and removes all characters other than letters and digits from that, and presents the result as output. It's a couple of lines in perl...not sure how to do it in C. If anyone has any ideas let me know. Thanks.

[Prelude]

Look in ctype.h for isalnum, isdigit and isalpha:

#include <stdio.h>
#include <ctype.h>

int main ( void )
{
  int c;

  while ( ( c = getchar() ) != '\n' ) {
    if ( isalnum ( c ) )
      putchar ( c );
  }

  return 0;
}

or

#include <stdio.h>
#include <ctype.h>

int main ( void )
{
  int c;

  while ( ( c = getchar() ) != '\n' ) {
    if ( isalpha ( c ) || isdigit ( c ) )
      putchar ( c );
  }

  return 0;
}