#include <fstream>
#include <iostream>


using namespace std;


int main(int argc, char *argv[]) {

 // On déclare les variables qui seront extraites de la ligne de commande
  int lnbligne1(0);
  int lnbligne2(0);
  std::string lPrefixeEntree1;
  std::string lPrefixeEntree2;

  if (argc != 3) {
    cout << "Usage " << argv[0] << " nom_du_data1.U nom_du_data_ref.U " << endl;
    return -1;
  }
  else {
    lPrefixeEntree1 = argv[1];
    lPrefixeEntree2 = argv[2];
  }

  std::cout.precision(12);
  std::cout.setf(std::ios::scientific);

  double lx1,lx2,lx3,lx4,lx5,lx6,lx,ly;
  double lxp[1000], lyp[1000];

  std::ifstream lEntree(lPrefixeEntree2.c_str());

  if (!lEntree.is_open()){
     std::cout << "Fichier " << lPrefixeEntree2<< " n'existe pas"<<std::endl;
     exit(1);
  }

  lnbligne2=0;
  char lBidon[128];
  lEntree.getline(lBidon,128);
  while (lEntree.good()){
    lEntree >> lxp[lnbligne2] >> lx1>> lx2 >> lx3 >> lx4 >> lx5 >> lx6 >> lyp[lnbligne2] ;
    ++lnbligne2;
  }
  --lnbligne2;

  lEntree.close();
  lEntree.open(lPrefixeEntree1.c_str());

  if (!lEntree.is_open()){
     std::cout << "Fichier " << lPrefixeEntree1<< " n'existe pas"<<std::endl;
     exit(1);
  }

  int j = 0;
  double lycalcule(0.);
  std::cout <<"Temps  C_approx C_exact 100*(C_approx-C_exact)/C_exact"<<std::endl;
  lEntree.getline(lBidon,128);
  while (lEntree.good()){
    lEntree >> lx >> lx1>> lx2 >> lx3 >> lx4 >> lx5 >> lx6 >> ly;
    if(lEntree.good()){
      for (; j< lnbligne2-1;++j){
        if((lx >= lxp[j]) && (lx <= lxp[j+1])){
           lycalcule = (lx-lxp[j])*(lyp[j+1]-lyp[j])/(lxp[j+1]-lxp[j]) + lyp[j];
           break;
        }
      }
      std::cout<<lx<<" "<<ly<<" "<<lycalcule<<" "<<100.*(ly-lycalcule)/lycalcule<<std::endl;
    }
  }
  lEntree.close();
  return 0;
}