C++ Blatt 6 A15.cc

#include <iostream>
#include <iomanip>
#include <fstream>
#include <cstdlib>
#include <sstream>
#include <vector>
using namespace std;
 
string map[] = {".", ",", "~", "=", "+", ":", "?", "$", "7", "8", "D", "I", "M", "N", "O", "Z"};
 
void print(string filename) {
  int x, y, i, j;
  string str;
  ifstream file(filename);
 
  file >> x;
  file >> y;
 
  cout << endl << endl << filename << endl;
 
  while (file >> i && file >> j) {
    for (int n = 0; n < j; n++)
      str.append(map[i]);
  }
 
  for (int n = 0; n < str.length(); n++) {
    if (n % x == 0)
      cout << endl;
    cout << str[n];
  }
}
 
int main() {
  for (int i = 1; i <= 4; i++)
    print("a15-bild" + to_string(i) + ".dat");
}

C++ Blatt 6 A16.cc

#include <iostream>
#include <iomanip>
#include <fstream>
#include <cstdlib>
#include <sstream>
#include <vector>
using namespace std;

vector<double> x, y;

double L(int i, double input) {
  double product = 1;

  for (int k = 0; k < x.size(); k++)
    product *= (i == k) ? 1 : (input - x[k]) / (x[i] - x[k]);

  return product;
}

double f(double input) {
  double sum = 0;

  for (int i = 0; i < y.size(); i++)
    sum += y[i] * L(i, input);

  return sum;
}

void getfile(string filename) {
  double i, j;
  ifstream file(filename);

  while (file >> i >> j) {
    x.push_back(i);
    y.push_back(j);
  }
}

int main() {
  double input;
  ofstream output("a16-interpol-res.dat");
  getfile("a16-interpol.dat");

  while (true) {
    cout << "x: ";
    cin >> input;

    if (input == 0)
      break;

    cout << "y: " << f(input) << endl;
    output << input << "  " << f(input) << endl ;
  }
}