Implement Strcspn() As Defined In Its Man Page, Excerpted Here: Size_t Strcspn (Const Char *S, Const Char *Reject); The Strcspn() Function Returns The Number Of Bytes In The Initial Segment Of S Which Consists Entirely Of Bytes Not In Reject. For Instance: Strcspn(\"Flux Capacitor\", \"Abcde\") Returns 5.