extern void echo_input(FILE*, char*, char*);
extern int word_count(char*);
extern char* get_input(void);
extern bool silent_yes(void);
extern bool yes(const char*, const char*, const char*);
extern void echo_input(FILE*, char*, char*);
extern int word_count(char*);
extern char* get_input(void);
extern bool silent_yes(void);
extern bool yes(const char*, const char*, const char*);