Update README.md

ch03/README.md

@@ -176,14 +176,7 @@ This code will print all characters in `ca`, afterwards as no `\0` appended, **U
 >In this section, we noted that it was not only illegal but meaningless to try to add two pointers.
 Why would adding two pointers be meaningless?
 
-
-Because Subtracting two points gives a logically explainable result - the offset
-in memory between two points. Similarly, you can subtract or add an integral number to/from a pointer,
-which means "move the pointer up or down". Adding a pointer to a pointer is something which is hard to
-explain. The result is meaningless.
-
-----
-References:
+See:
 - [Why can't I add pointers](http://stackoverflow.com/questions/2935038/why-cant-i-add-pointers)
 
 ##[Exercise 3.39](ex3_39.cpp)