#include <iostream>
#include <cstdlib>
#include <cmath>
using namespace std;

/*
  HAD
    calc accel
    store vel

    update pos
    update vel
    
    print cur data
  repeat
*/

int main(int argc, char **argv){
    double a, 
	k = 1, 
	m = 1, 
	t = 0, 
	dt = .001,
	v = 0, 
	vp,
	x = 1,
	xp;

    while(t<10){
	t += dt;
	a = vp = ((-k)/m)*x;
	xp = v;	
	x = (vp *dt);
	v += a;
	
	cout << "t: " << t << "\tv: " << v
	     << "\tvp: " << vp << "\tx: "
	     << x << "\txp: " << xp << endl;
    }
    
    cout << "Answer: " << x << endl;

    return 0;
}