Added reference to #304

Mooophy · Jul 23, 2015 · b5c2fcd · b5c2fcd
1 parent da53210
commit b5c2fcd
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/ch13/README.md b/ch13/README.md
@@ -151,7 +151,7 @@ The member (smart pointer and container) will be copied.
 ## Exercise 13.21:
 >Do you think the TextQuery and QueryResult classes need to define their own versions of the copy-control members? If so, why? If not, why not? Implement whichever copy-control operations you think these classes require.
 
-As synthesized version meet all requirements for this case, no custom version control memebers need to define.
+As synthesized version meet all requirements for this case, no custom version control memebers need to define. Check [#304](https://github.com/Mooophy/Cpp-Primer/issues/304#issuecomment-124081395) for detail.
 
 ## [Exercise 13.22](ex13_22.h)