Regarding clustering in PSO, I want to modify energy factor in my code. where e=(E residual) / ( E total). That means ratio of residual energy of cluster head to energy of cluster member. How can i change the code?

 The Fitness Function for Clustering in PSO includes three parameters in which two are already done. I have a doubt with energy parameter. where e=(E residual) / ( E total). That means ratio of residual energy of cluster head to energy of cluster member. Attached the code of fitness equation and main function.