Population and Chromosome classes refactored so that EAs are easier to implement.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/jcgp/function/Subtraction.java b/src/jcgp/function/Subtraction.java
index d785614..cfbb907 100644
--- a/src/jcgp/function/Subtraction.java
+++ b/src/jcgp/function/Subtraction.java
@@ -1,5 +1,6 @@
 package jcgp.function;
 
+import jcgp.exceptions.InvalidArgumentsException;
 import jcgp.population.Connection;
 
 public class Subtraction extends Function {
@@ -11,7 +12,12 @@ public class Subtraction extends Function {
 		if (connections.length < arity) {
 			throw new InvalidArgumentsException("Not enough connections were given.");
 		} else if (connections[0].getValue() instanceof Integer) {
-			return ((Integer) connections[0].getValue()) - ((Integer) connections[1].getValue());
+			Integer arg1 = ((Integer) connections[0].getValue());
+			Integer arg2 = ((Integer) connections[1].getValue());
+			Integer result = arg1 - arg2;
+			
+			System.out.println(arg1 + " - " + arg2 + " = " + result);
+			return result;
 		} else {
 			throw new InvalidArgumentsException("Wrong data type, this function takes Integer.");
 		}