Computing the Reverse Eccentric Connectivity Index for Certain Family of Nanocone and Fullerene Structures

Algorithm 1

public class EccDivNgu

  public double calculate (int  )

    if ()

       throw new IllegalArgumentException (“ must >= 3”);

    // cal 1 – 4

    int  ;

    double sum = ()/10.0

        +()/(6.0 ())

        +()/(7.0 ())

        +()/(9.0 ());

    // cal 5 − 2n

    for (int  ; <= 2    ; ++)

       int no =   −  ()/2;

       int ecc = ;

      sum += ecc/(9.0 no);

    return sum;