Kayne, this is an example of delta_time in C++11

gistfile1.cpp

#include <iostream>
#include <chrono>
#include <thread>
#include <cmath>

#define TIME_WASTE_MAGIC_NUMBER 5000000

using std::chrono::duration_cast;
using std::chrono::milliseconds;
using std::chrono::monotonic_clock;

float entity_position; /* used to represent the position of some test entity in space */
void one_of_your_entities_to_update(float delta_time); /* used to represent an update method for a test entity */

int main(int argc, char** argv)
{
	//steady_clock for GCC 4.7+
	auto current_frame = monotonic_clock::now();
	auto last_frame = monotonic_clock::now();
	
	while (true)
	{
		last_frame = current_frame;
		current_frame = monotonic_clock::now();

		/* while the duration cast should yield whole numbers there are benefits to casting to float fraction of a second in terms of explaining motion */
		float delta_time = (duration_cast<milliseconds>(current_frame - last_frame).count() / 1000.0f);

		std::cout << "Time spent in last frame: " << delta_time << std::endl;

		/* now here's where we would run any and all updates */
		one_of_your_entities_to_update(delta_time);

		std::cout << "The entity is currently at x = " << entity_position << std::endl;

		/* waste time */
		for (int i = 0; i < TIME_WASTE_MAGIC_NUMBER; i++)
		{
			sqrt(i);
		}
	}
}


void one_of_your_entities_to_update(float delta_time)
{
	constexpr float speed = 1; /* units per second */

	entity_position += (delta_time * speed);
}

I've done this already, I don't need this.