Something

#include "DuomRez.h"
#include "Skaiciavimai.h"

#include <iostream>
#include <fstream>
using namespace std;
int main(int argc, char *argv[]) {
    ifstream f;
    int sk;
    char eil[20]; double xklav; double epsklav; 
    //boolean skaityta = false;
    DuomRez* duom = new DuomRez();
    Skaic* skaic = new Skaic();

      while (true) {    
      while (true) {
         cout << "[=-{----------------!+!----------------\n";
         cout << "[=-{ Galimos Komandos :         ";
         cout << "[=-{----------------!+!----------------\n";
         cout << "[=-{ 1. Nuskaityti faila;              \n";
         cout << "[=-{ 2. Ivesti duom. klaviatura;       \n";
         cout << "[=-{ 3. Skaiciuoti;                    \n";
         cout << "[=-{ 4. Isvesti Tarpinius Rezultatus;  \n";
         cout << "[=-{ 5. Isvesti Galutinius Rezultatus; \n";
         cout << "[=-{ 6. Iseiti is programos.           \n";
         cout << "[=-{----------------!+!----------------\n";
         cout << "[=-{ Pasirinkite: \n\n";
         cin >> sk;
              
          // sk = Integer.parseInt(eil);
           break;
      }
      switch (sk) {
        case 1: {               
		char fpav[20]
                cout << "hi\n";  // <--- problem here
                cin >> fpav;
               
                  duom.IvestiIsF(fpav);
                  break;
            
        }
        case 2: {.....