No response from service, node won't close either

edit

I am running into an issue with calling a service in the callback function of a listener. I couldn't find a way to call the service as the initialization of the client stood in the main, but moving that to the function as well gave a whole different series of errors, so i tried to implement a work-around

#include "ros/ros.h"
#include "std_msgs/String.h"
#include "final/add_duplicates.h"
#include <string>
int message = 0;
std::string text;

void preparefortrouble(const std_msgs::String::ConstPtr& msg)
{
text = msg->data.c_str();
message = 1;
}

int main(int argc, char **argv)
{
    ros::init(argc, argv, "add_duplicates_client");
    ros::init(argc, argv, "print_twice");
    ros::NodeHandle n;  
    ros::Subscriber sub = n.subscribe("print_twice", 1, preparefortrouble);
    ros::ServiceClient client = n.serviceClient<final::add_duplicates>("add_duplicates");

    while (1){
        while (message == 1)
        {
            final::add_duplicates srv;
            srv.request.text = text.c_str();
            srv.request.nrOfDuplicates = 2;
            if (client.call(srv) == false)
            {
                ROS_ERROR("Orga het is stuk");
            }
            message = 0;
        }
    }
  ros::spin();

  return 0;
}

The server has been tested and works fine, the topic is called in the terminal. However, when i use this node, it cannot be close by crtl-c and sending a message to the topic results in nothing.

i try to call it with

$ rostopic pub /print_twice std_msgs/string “hello"

and my srv file is as following:

string text
int32 nrOfDuplicates
---
string multitext

thanks for the support.