why commandline argument syntax in publisher node

[hariharan382]

why commandline argument in publisher node syntax ,since we have already given the data to be published in code

include "ros/ros.h"

include "std_msgs/String.h"

include

int main(int argc,char **argv) -----------why commansline argument syntax is here,since not parsing any data { ros::init(argc,argv,"first_node"); ros::NodeHandle n; ros::Publisher pub=n.advertise("first_topic",10); ros::Rate loop_rate(10); int count;

while (ros::ok())
{
    std_msgs::String msg;
    std::string strrr;
    msg.data strrr="hi";----------here already i have the data to be published
    ROS_INFO("%s",msg.data.c_str());
    pub.publish(msg);
    ++count;
}
return 0;

}