README.md

@@ -538,32 +538,17 @@ TinySTL
 
 ####(17):shared_ptr
 
-    shared_ptr<int> sp1(new int(10));
-	assert(*(sp1.get()) == 10);
+    shared_ptr<string> sp1(new string("hello"));
+	assert(sp1.use_count() == 1);
+	assert(*sp1 == "hello");
+	sp1->append(" world");
+	assert(*sp1 == "hello world");
 
-	shared_ptr<int> sp2(new int(1), default_delete<int>());
-	assert(sp2.use_count() == 1);
-
-	auto sp3(sp2);
-	assert(sp3.use_count() == 2);
-			
-	auto sp4 = sp2;
-	assert(sp4.use_count() == 3);
-
-	assert(sp2.get() == sp3.get() && sp2.get() == sp4.get());
-	assert(sp2 == sp3 && !(sp2 != sp4));
-
-	shared_ptr<string> sp5(new string("hello"));
-	assert(*sp5 == "hello");
-	sp5->append(" world");
-	assert(*sp5 == "hello world");
-
-	auto sp6 = make_shared<string>(10, '0');
-	assert(*sp6 == "0000000000");
-
-	shared_ptr<int> spp;
-	assert(spp == nullptr);
-	assert(!(spp != nullptr));
+	{
+		auto sp2 = sp1;
+		assert(sp1.use_count() == 2);
+	}
+	assert(sp1.use_count() == 1);