diff --git a/mindspore/ccsrc/cxx_api/context.cc b/mindspore/ccsrc/cxx_api/context.cc
index 7db70c8bff8..484a13cf414 100644
--- a/mindspore/ccsrc/cxx_api/context.cc
+++ b/mindspore/ccsrc/cxx_api/context.cc
@@ -231,7 +231,7 @@ std::vector<char> AscendDeviceInfo::GetDynamicBatchSizeChar() const {
   return StringToChar(ref);
 }
 
-void AscendDeviceInfo::SetDynamicImageSize(const std::vector<char> &dynamic_image_size) { return; }
+void AscendDeviceInfo::SetDynamicImageSize(const std::vector<char> &) { return; }
 
 std::vector<char> AscendDeviceInfo::GetDynamicImageSizeChar() const { return std::vector<char>(); }
 
diff --git a/mindspore/ccsrc/cxx_api/factory.h b/mindspore/ccsrc/cxx_api/factory.h
index 421a6e78429..db0be3be2ea 100644
--- a/mindspore/ccsrc/cxx_api/factory.h
+++ b/mindspore/ccsrc/cxx_api/factory.h
@@ -27,25 +27,13 @@ namespace mindspore {
 inline enum DeviceType g_device_target = kInvalidDeviceType;
 
 static inline LogStream &operator<<(LogStream &stream, DeviceType device_type) {
-  switch (device_type) {
-    case kAscend:
-      stream << "Ascend";
-      break;
-    case kAscend910:
-      stream << "Ascend910";
-      break;
-    case kAscend310:
-      stream << "Ascend310";
-      break;
-    case kGPU:
-      stream << "GPU";
-      break;
-    case kCPU:
-      stream << "CPU";
-      break;
-    default:
-      stream << "[InvalidDeviceType: " << static_cast<int>(device_type) << "]";
-      break;
+  std::map<DeviceType, std::string> type_str_map = {
+    {kAscend, "Ascend"}, {kAscend910, "Ascend910"}, {kAscend310, "Ascend310"}, {kGPU, "GPU"}, {kCPU, "CPU"}};
+  auto it = type_str_map.find(device_type);
+  if (it != type_str_map.end()) {
+    stream << it->second;
+  } else {
+    stream << "[InvalidDeviceType: " << static_cast<int>(device_type) << "]";
   }
   return stream;
 }
diff --git a/mindspore/ccsrc/cxx_api/model/acl/acl_model.cc b/mindspore/ccsrc/cxx_api/model/acl/acl_model.cc
index 427ab0ccf04..05b89443bca 100644
--- a/mindspore/ccsrc/cxx_api/model/acl/acl_model.cc
+++ b/mindspore/ccsrc/cxx_api/model/acl/acl_model.cc
@@ -120,7 +120,7 @@ Status AclModel::Resize(const std::vector<MSTensor> &inputs, const std::vector<s
 
   if (model_context_ == nullptr) {
     model_context_ = std::make_shared<Context>();
-    model_context_->MutableDeviceInfo().emplace_back(std::make_shared<AscendDeviceInfo>());
+    (void)model_context_->MutableDeviceInfo().emplace_back(std::make_shared<AscendDeviceInfo>());
   }
 
   std::string input_shape_option;