text: #ifndef DECRYPT_H
  #define DECRYPT_H
  
  #include <stdio.h>
  #include "encrypt.h"
  
  unsigned char bits_to_byte(char* str);
  
  char* get_data(SImage img, int dataLength);
  int get_data_length(SImage img);
  int find_header(SImage img);
  void decrypt(char* filename);
  
  #endif
  