Fixed - Spelling Mistake - Chapter1.md

Bruce Liu · Bruce Liu · commit 99d27e0e2451 · 2018-05-16T09:45:44.000+08:00
diff --git a/files/chapter1.md b/files/chapter1.md
@@ -98,7 +98,7 @@ class OperationFactory
 // 客户端代码
 $operation = OperationFactory::createOperation('+');
 $operation->setA(1);
-$operation->seB(2);
+$operation->setB(2);
 echo $operation->getResult()."\n";
 ```
 
