Adding code to Lesson4

eo/tutorial/Lesson4/binary_value.h

@@ -0,0 +1,25 @@
+#include <eo>
+
+//-----------------------------------------------------------------------------
+
+/** Just a simple function that takes binary value of a chromosome and sets
+    the fitnes.
+    @param _chrom A binary chromosome 
+*/
+
+template <class Chrom> float binary_value(const Chrom& _chrom)
+{
+  float sum = 0;
+  for (unsigned i = 0; i < _chrom.size(); i++)
+    if (_chrom[i])
+      sum += pow(2, _chrom.size() - i - 1);
+  return sum;
+}
+
+struct BinaryValue
+{
+  template <class Chrom> void operator()(Chrom& _chrom)
+  {
+    _chrom.fitness(binary_value(_chrom));
+  }
+};