1 files changed, 10 insertions, 0 deletions
diff --git a/Help/guide/tutorial/Step7/MathFunctions/mysqrt.cxx b/Help/guide/tutorial/Step7/MathFunctions/mysqrt.cxx
index abe767d..3d2492a 100644
--- a/Help/guide/tutorial/Step7/MathFunctions/mysqrt.cxx
+++ b/Help/guide/tutorial/Step7/MathFunctions/mysqrt.cxx
@@ -1,5 +1,6 @@
 #include <iostream>
 
+// TODO 4: include cmath
 #include "MathFunctions.h"
 
 // a hack square root calculation using simple operations
@@ -9,6 +10,14 @@ double mysqrt(double x)
     return 0;
   }
 
+  // TODO 5: If both HAVE_LOG and HAVE_EXP are defined,  use the following:
+  //// double result = std::exp(std::log(x) * 0.5);
+  //// std::cout << "Computing sqrt of " << x << " to be " << result
+  ////        << " using log and exp" << std::endl;
+  // else, use the existing logic.
+
+  // Hint: Don't forget the #endif before returning the result!
+
   double result = x;
 
   // do ten iterations
@@ -20,5 +29,6 @@ double mysqrt(double x)
     result = result + 0.5 * delta / result;
     std::cout << "Computing sqrt of " << x << " to be " << result << std::endl;
   }
+
   return result;
 }