add help message for simplepose example (Tencent#2495)

nihui · Dec 23, 2020 · fcf02cc · fcf02cc
1 parent 3c99287
commit fcf02cc
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/examples/simplepose.cpp b/examples/simplepose.cpp
@@ -137,6 +137,12 @@ static void draw_pose(const cv::Mat& bgr, const std::vector<KeyPoint>& keypoints
 
 int main(int argc, char** argv)
 {
+    if (argc != 2)
+    {
+        fprintf(stderr, "Usage: %s [imagepath]\n", argv[0]);
+        return -1;
+    }
+
     const char* imagepath = argv[1];
 
     cv::Mat m = cv::imread(imagepath, 1);