Adding the Two numbers using c++ REST SDK

#include <cpprest/http_client.h>
#include <cpprest/filestream.h>
#include <cpprest/http_listener.h>             
#include <cpprest/json.h>                      
#include <cpprest/uri.h>                                      
#include <cpprest/containerstream.h>            // Async streams backed by STL containers
#include <cpprest/interopstream.h>              // Bridges for integrating Async streams with 
#include <cpprest/rawptrstream.h>               // Async streams backed by raw pointer to 
#include <cpprest/producerconsumerstream.h>     // Async streams for producer consumer 
#include <iostream>
#include <sstream>

using namespace std;
using namespace utility;                    // Common utilities like string conversions
using namespace web;                        // Common features like URIs.
using namespace web::http;                  // Common HTTP functionality
using namespace web::http::client;          // HTTP client features
using namespace concurrency::streams;       // Asynchronous streams
using namespace web::http::experimental::listener;

int sample1()
{
	int A1, A2;
	cout << "Enter the Number1 ";
	cin >> A1;
	cout << "Enter the Number2 ";
	cin >> A2;
	int sum1 = A1 + A2;
	return sum1;
}

int main(int argc, char *args[])
{
	// Client side process
	http_client client(L"http://localhost:8080/sum1");
	client.request(methods::GET).then([](http_response response)
	{
		if (response.status_code() == status_codes::OK)
		{
			auto body = response.extract_string().get();
			wostringstream ss;
			ss << L"Server returned status code " << response.status_code() << L"." << std::endl;
			std::wcout << ss.str();
			//sample1();
			std::wcout << "SUM of Addition Result = " << body << endl;
			getchar();
		}
	});

	//server side  process
	http_listener listenerVoices_1(L"http://localhost:8080/sum1");
	listenerVoices_1.support(web::http::methods::GET, [](web::http::http_request request)
	{
		int sum1 = sample1();
		request.reply(web::http::status_codes::OK, sum1);
	}
	);
	listenerVoices_1.open().wait();
	std::string line;
	std::cout << "Press enter to exit" << std::endl;
	std::getline(std::cin, line);

	listenerVoices_1.close().wait();

	getchar();
	return 0;
}