#include <iostream>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#define g 9.80665 //m/s^2
#define T_MAX 10 //sec 
#define T_STEP 1 //sec 
using namespace std;
int main(int argc, char *argv[]){
  //calculate the freefall
  double t;
  double y,vy;
t=0;  
y=0;
  vy=0;
  //  for(t=0;t<T_MAX+1;t++){
  while(t<T_MAX+1){
    cout << "t="<<t<<"\tvy="<<vy<<"\ty="<<y<<endl;
    vy-=g*T_STEP; // same as vy=vy-g
    y+=vy*T_STEP; // same as y=y-vy
    t+=T_STEP;
  }
  return 0;
}