A question about eclipse and c++ in ROS

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I am trying to use eclipse for programming c++ in ROS, I have one question about run node topic in ROS without using launch file. Example I want to write a program for receive data from Asus xtion Pro live, for receive data, I must run 3dsensor.launch before run and debug. So are there any solution for me to solve this issue my code is

#include <ros/ros.h>
#include <image_transport/image_transport.h>
#include <cv_bridge/cv_bridge.h>
#include <opencv2/imgproc/imgproc.hpp>
#include <sensor_msgs/image_encodings.h>
#include <opencv2/highgui/highgui.hpp>

static const std::string OPENCV_WINDOW ="image window";
class ImageConverter
{
    ros::NodeHandle nh_;
    image_transport::ImageTransport it_;
    image_transport::Subscriber image_sub_;
    image_transport::Publisher image_pub_;
public:
    ImageConverter()
    : it_(nh_)
    {
        image_sub_ = it_.subscribe("/camera/rgb/image_raw",1,&ImageConverter::imageCb,this);
        image_pub_ = it_.advertise("image_converter/output_video",1);
        cv::namedWindow(OPENCV_WINDOW);

    }
    ~ImageConverter()
    {
        cv::destroyWindow(OPENCV_WINDOW);
    }
    void imageCb(const sensor_msgs::ImageConstPtr & msg)
    {
        cv_bridge::CvImagePtr cv_ptr;
        try
        {
            cv_ptr = cv_bridge::toCvCopy(msg,sensor_msgs::image_encodings::BGR8);
        }
        catch (cv_bridge::Exception & e)
        {
            ROS_ERROR("cv_bridge exception : %s",e.what());
            return;
        }
        //draw a circle
        if(cv_ptr->image.rows >60 && cv_ptr->image.cols > 60)
            cv::circle(cv_ptr->image,cv::Point(50,50),10,CV_RGB(255,0,0));
        //update UI Window
        cv::imshow(OPENCV_WINDOW,cv_ptr->image);
        cv::waitKey(3);

        image_pub_.publish(cv_ptr->toImageMsg());

    }
};

int main(int argc , char** argv)
{
    ros::init(argc,argv,"image_converter");
    ImageConverter ic;
    ros::spin();
    return 0;
}