text: #ifndef QUICKSORT_H
  #define QUICKSORT_H
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /*
  1 argument: array of interager that should be sorted
  2 argument: index of first element that would be sorted
  3 argument: index of last element that would be sorted
  resault: array will be sorted from index start to lastIndex incuding both elements that are pointed by start and lastIndex
  */
  void quicksort(int* tab, int start, int lastIndex);
  
  #ifdef __cplusplus
  }  //extern "C"
  #endif
  
  #endif // QUICKSORT_H
  