From 016088f8fd6019b0b806b4b0ed792ad25a74d29d Mon Sep 17 00:00:00 2001
From: evan617 <flyence@gmail.com>
Date: Thu, 13 Nov 2014 12:06:14 +0800
Subject: [PATCH] Fix the exercise4.30

---
 ch04/README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ch04/README.md b/ch04/README.md
index 13a1d035..20eab4da 100644
--- a/ch04/README.md
+++ b/ch04/README.md
@@ -264,7 +264,7 @@ reference: [Why the size of a pointer is 4bytes in C++](http://stackoverflow.com
 sizeof x + y      // sizeof(x+y)
 sizeof p->mem[i]  // sizeof(p->mem[i])
 sizeof a < b      // sizeof(a) < b
-sizeof f()        // compile successfully.
+sizeof f()        // compile error if the return of f() is void. If f() has a return value, compile successfully.
 ```
 
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