Convert rostopic pub into c++ code

edit

i have coded this but there is not echo from the function clodeGripper().

  ros::NodeHandle node_handle;
  ros::Publisher gripper_angle = node_handle.advertise<std_msgs::UInt16>("angle", 10);
  std_msgs::UInt16 msg;
  msg.data = 180;
  gripper_angle.publish(msg);

Please post your complete code, and if there is an error output when compiling it or running it, post that as well. Use a GitHub Gist if it's long.

Maybe I can redirect you here, https://answers.ros.org/question/3556...

• That question duplicates this one, with different wording and a little different information. Please do not do that.
• That question still doesn't include your entire source.

I am sorry for the mistake that I have made. I am new to posting questions online and asking for help. this is the link to both the files of the publisher and the subscriber for the question above.

https://github.com/MojoZuikie/eti_mov...

The problem is that you are creating a publisher in the closeGripper() and openGripper() functions, using that to publish a message, then exiting the function. It is likely that the publisher is being cleaned up by going out of scope before it even has a chance to publish the message, and even if it publishes the message it probably does so before any subscribers listening to that topic get connected to the publisher. You need to create a single publisher for the topic once in your node's set up, then use that throughout.

I found out a way to control the gripper using the code above. Thanks Very much.