diff --git a/hdc/service/examples/sample.h b/hdc/service/examples/sample.h
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+/*
+ * Copyright (c) 2021 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef EXAM_H
+#define EXAM_H
+
+#include <mutex>
+#include <thread>
+#include <unordered_map>
+#include <string>
+
+using std::string;
+
+namespace OHOS {
+namespace Example {
+class Basic {
+public:
+    std::string basicName;    
+public:
+    int getBasicId() 
+	{
+        return this->basicId;
+    }
+private:
+    int basicId;
+};
+
+class Human : public Basic {
+public:
+    bool getOpFlag() 
+	{
+		return this->opFlag;
+	}
+public:
+    int age = 0;
+private:
+    bool opFlag;
+}
+
+struct Book {
+    int getCc() 
+	{
+		return this->cc;
+	}
+public:
+    int aa;
+private:
+    int cc;
+}
+
+/**
+ * @brief service服务，提供IPC调用接口
+ * @ServiceClass
+ */
+class Exam2 {
+public:
+    Book getBook(Basic& basic);
+    int fun1 (Book v1);
+    int fun2 (Basic& basic, Human& human);
+};
+}  // namespace Example
+}  // namespace OHOS
+#endif  // EXAM_H