erikkkkk C++

#include <iostream>#include <fstream>using namespace std;int main(){  char sring1[20], string2[20], string3[20];  ifstream invoerstroom("hallo.txt");    if(!invoerstroom.is_open()) {        cerr << "Fout: Bestand niet kunnen oppenen." << endl;        exit(1);                               }         invoerstroom >> string1;   invoerstroom >> string2;   invoerstroom >> string3;      cout << string1 << " " << string2 << " " << string3  << endl;   invoerstroom.close();      return 0;}