Update ex13_28.cpp

Please refer to: http://stackoverflow.com/questions/615355/is-there-any-reason-to-check-for-a-null-pointer-before-deleting I don't think we need to check nullptr before delete.
bumzy · May 3, 2016 · faf6b92 · faf6b92
1 parent 32a8b81
commit faf6b92
Showing 1 changed file with 2 additions and 7 deletions.
diff --git a/ch13/ex13_28.cpp b/ch13/ex13_28.cpp
@@ -12,13 +12,8 @@ TreeNode& TreeNode::operator=(const TreeNode &rhs)
 {
     ++*rhs.count;
     if (--*count == 0) {
-        if (left) {
-            delete left;
-        }
-        if (right) {
-            delete right;
-        }
-
+        delete left;
+        delete right;
         delete count;
     }
     value = rhs.value;