sample for c++ agent,cpp

// ConsoleApplication1.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <agents.h>
#include <string>
#include <iostream>
#include <algorithm>
#include "file_reader.h"
#include <json/json.h>

using namespace concurrency;
using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
	event e;

	// The components of the Adler-32 sum. 
	unsigned int a = 1;
	unsigned int b = 0;

	// A call object that updates the checksum when it receives data.
	call<string> calculate_checksum([&](string s) {
		// If the input string is empty, set the event to signal 
		// the end of processing. 
		if (s.size() == 0)
			e.set();
		// Perform the Adler-32 checksum algorithm.
		for_each(begin(s), end(s), [&](char c) {
			a = (a + c) % 65521;
			b = (b + a) % 65521;
		});
	});

	file_reader reader("D:\\test.txt", calculate_checksum);

	reader.start();
	agent::wait(&reader);

	e.wait();

	std::exception error;
	if (reader.get_error(error))
	{
		wcout << error.what() << endl;
	}
	else
	{
		unsigned int adler32_sum = (b << 16) | a;
		wcout << L"Adler-32 sum is " << hex << adler32_sum << endl;
	}
	getchar();
	return 0;
}