// Program to read info from a file, make simple calculations
//  and print results to a file
// Jim Crumley  20090213
//
#include <iostream>
#include <cmath>
#include <fstream>
#include <string>
using namespace std;

int main ()
{
  ifstream inp;
  ofstream out;
  inp.open("first_num");
  out.open("results");
  const int n=100000;
  int num_step, i;
  float x[n], y[n], z[n], t[n], delt_t;
  char title[80];  

  //minor error checking
  if(inp ==0) cout <<
    "Egads input file didn't open. That can't be good.\n";
  if(out ==0 ) cout << 
    "Output file didn't open. I should really crash.\n";

  //read from input file
  inp.getline(title,80);
  inp>>num_step>>delt_t>>x[0]>>y[0]>>z[0];
  inp.close();

  //echo input
  cout<<title<<"\n"<<num_step<<"\n"<<delt_t<<"\n";
  cout<<x[0]<<" "<<y[0]<<" "<<z[0]<<"\n";

  t[0]=0;
  out<<title<<"\n"<<num_step<<"\n";

  //out.width(12);
  // loop through and do calcululations and print them out
  for (i=1; i<num_step; i++)
  {
    t[i]= t[i-1]+delt_t;
    x[i] = 3*t[i]*t[i];
    y[i] = 7.5 * sqrt(t[i]);
    z[i]= x[i] * y[i];
    out<<t[i]<<" "<<x[i]<<" "<<y[i]<<" "<<z[i]<<"\n";
  }
  out.close();
  return 0;
}