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How do you save ROS tutorial subscriber data?

asked 2019-07-23 05:19:50 -0500

sw14928
3 ●8 ●9 ●12

In the "Writing a Simple Publisher and Subscriber (C++)" tutorial it states that in:

void chatterCallback(const std_msgs::String::ConstPtr& msg)
{
  ROS_INFO("I heard: [%s]", msg->data.c_str());
}

The message is passed in a boost shared_ptr, which means you can store it off if you want.

How exactly can I use this to store my data in a text file. I have no clue where to begin with this. I went through the boost shared_ptr documentation, but I do not understand it.

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answered 2019-07-23 05:55:04 -0500

Mehdi.

flag of United Kingdom of Great Britain and Northern Ireland

3339 ●96 ●138 ●161 https://github.com/mehditlili

What speaks against doing a normal string write?

#include <fstream>
#include <string>
#include <iostream>

void chatterCallback(const std_msgs::String::ConstPtr& msg)
{
    std::ofstream out("output.txt");
    out << msg->data.c_str();
    out.close();
}