diff --git a/deploy/cpp/demo/classifier.cpp b/deploy/cpp/demo/classifier.cpp
index 57c4f09c3d8fe4c1dd48c6afd350cca581a2d194..7c32366faad038d87d8dd8717601ff891a67e193 100644
--- a/deploy/cpp/demo/classifier.cpp
+++ b/deploy/cpp/demo/classifier.cpp
@@ -110,15 +110,15 @@ int main(int argc, char** argv) {
               << ", score: " << result.score << std::endl;
   }
   std::cout << "Total running time: " 
-	    << total_running_time_s
-      << " s, average running time: "
-      << total_running_time_s / imgs 
-	    << " s/img, total read img time: " 
-	    << total_imread_time_s
-      << " s, average read time: "
-      << total_imread_time_s / imgs  
-	    << " s/img, batch_size = " 
-	    << FLAGS_batch_size 
-	    << std::endl;
+            << total_running_time_s
+            << " s, average running time: "
+            << total_running_time_s / imgs 
+            << " s/img, total read img time: " 
+            << total_imread_time_s
+            << " s, average read time: "
+            << total_imread_time_s / imgs  
+            << " s/img, batch_size = " 
+            << FLAGS_batch_size 
+            << std::endl;
   return 0;
 }
diff --git a/deploy/cpp/demo/detector.cpp b/deploy/cpp/demo/detector.cpp
index 956a7181808defbe7df127ea06d298f3757dce4b..60482ed32b1b0f0967b4d076014422d7edc9cd3c 100644
--- a/deploy/cpp/demo/detector.cpp
+++ b/deploy/cpp/demo/detector.cpp
@@ -142,16 +142,16 @@ int main(int argc, char** argv) {
   }
   
   std::cout << "Total running time: " 
-	    << total_running_time_s
-      << " s, average running time: "
-      << total_running_time_s / imgs
-	    << " s/img, total read img time: " 
-	    << total_imread_time_s
-      << " s, average read img time: "
-      << total_imread_time_s / imgs
-	    << " s, batch_size = " 
-	    << FLAGS_batch_size 
-	    << std::endl;
+            << total_running_time_s
+            << " s, average running time: "
+            << total_running_time_s / imgs
+            << " s/img, total read img time: " 
+            << total_imread_time_s
+            << " s, average read img time: "
+            << total_imread_time_s / imgs
+            << " s, batch_size = " 
+            << FLAGS_batch_size 
+            << std::endl;
 
   return 0;
 }
diff --git a/deploy/cpp/demo/segmenter.cpp b/deploy/cpp/demo/segmenter.cpp
index 87e1afdd41c3116b2027c4846d08dcfbb9a7dff6..bc13bde3e1744aa0a12bf9a99b38402064765359 100644
--- a/deploy/cpp/demo/segmenter.cpp
+++ b/deploy/cpp/demo/segmenter.cpp
@@ -116,16 +116,16 @@ int main(int argc, char** argv) {
     std::cout << "Visualized output saved as " << save_path << std::endl;
   }
   std::cout << "Total running time: " 
-	    << total_running_time_s
-      << " s, average running time: "
-      << total_running_time_s / imgs
-	    << " s/img, total read img time: " 
-	    << total_imread_time_s
-      << " s, average read img time: "
-      << total_imread_time_s / imgs
-	    << " s, batch_size = " 
-	    << FLAGS_batch_size 
-	    << std::endl;
+            << total_running_time_s
+            << " s, average running time: "
+            << total_running_time_s / imgs
+            << " s/img, total read img time: " 
+            << total_imread_time_s
+            << " s, average read img time: "
+            << total_imread_time_s / imgs
+            << " s, batch_size = " 
+            << FLAGS_batch_size
+            << std::endl;
 
   return 0;
 }