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1) Create an object of the ROS Msg/Srv. 2) Use the dot operator. Example:

include "std_msgs/String.h"

std_msgs::String msg; msg.data = "Hello World";

1)

Create an object of the ROS ~~Msg/Srv. 2)~~ Msg/Srv.

Use the dot ~~operator.~~ operator.

Example:
include "std_msgs/String.h"

#include "std_msgs/String.h" std_msgs::String msg; msg.data = "Hello World";World";

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