#include <iostream>
#include <cstring>
using namespace std;

const int INPUT_SIZE = 10;
string getString();
void copyValues(string, char[] );
void getChars(int, int, char[], char[]);
int getSubstring(char[], char[]);

int main() {
  char vals[INPUT_SIZE];
  char sub[INPUT_SIZE];
  string s1 = getString();
  if(s1.length()<=0){
    cout<<"Nu ati introdus nici un sir\n";
    return 0;

  }
  if(s1.length()>=INPUT_SIZE){
    cout<<"Sirul de caractere introdus nu trebuie sa depaseasca "<<INPUT_SIZE<<" caractere\n";
    return 0;
  }
  copyValues(s1,vals);
  if(getSubstring(vals,sub)){
    if(strlen(sub))
        cout << "sub string: " << sub << endl;
    else cout << "Daca valorile [start] si [end] sunt egale sirul e vid\n";
  }
  return 0;
}
string getString() {
  cout << "Please type a string: ";
  string s;
  getline(cin,s);
  return s;
}
void copyValues(string s, char vals[])
{ int i;
  for (i = 0; i < s.length(); i++)
    vals[i] = s.at(i);
  vals[i] ='\0';
}
void getChars(int start, int end, char vals[], char newChars[]){
    int sz = end-start+1;
    // doar sz-1 caractere, sa ramana spatiu pentru terminator
    int i;
    for (i=0; i < sz - 1; i++)
       newChars[i] = vals[start + i];
    newChars[i] = '\0';
}
int getSubstring(char vals[],char newChars[]) {
  int start;
  int end;
  cout << "Starting point(integer index): ";
  cin >> start;

  cout << "Ending point(integer index): ";
  cin >> end;
  if(start<0 || end<0 || start>strlen(vals) || end>strlen(vals)){
    cout<<"Valorile introduse trebuie sa fie valori numerice intregi si trebuie sa fie intre [0,"<<strlen(vals)<<")\n";
    return 0;
  }
  else if (start>end){
    cout<<"Valoarea [end] nu trebuie sa fie mai mica ca si valoarea [start]\n";
    return 0;
  }
  getChars(start, end, vals, newChars);
  return 1;
}