Add deleted field

src/DirectoryRecord.c

 #include "DirectoryRecord.h"
 
+#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
-DirectoryRecord *DirectoryRecord_init(char phone_number[11], char name[21], char surname[21], int birth_date_year, int birth_date_month, int birth_date_day) {
+DirectoryRecord *DirectoryRecord_init(bool deleted, char phone_number[11], char name[21], char surname[21], int birth_date_year, int birth_date_month, int birth_date_day) {
     DirectoryRecord *record = (DirectoryRecord *)malloc(sizeof(DirectoryRecord));
+    record->deleted = deleted;
     strcpy(record->phone_number, phone_number);
     strcpy(record->name, name);
     strcpy(record->surname, surname);

src/DirectoryRecord.h

 #ifndef DIRECTORY_RECORD_H
 #define DIRECTORY_RECORD_H
 
+#include <stdbool.h>
+
 typedef struct DirectoryRecord {
+    bool deleted;
     char phone_number[11];
     char name[21];
     char surname[21];
@@ -10,7 +13,7 @@ typedef struct DirectoryRecord {
     int birth_date_day;
 } DirectoryRecord;
 
-DirectoryRecord *DirectoryRecord_init(char phone_number[11], char name[21], char surname[21], int birth_date_year, int birth_date_month, int birth_date_day);
+DirectoryRecord *DirectoryRecord_init(bool deleted, char phone_number[11], char name[21], char surname[21], int birth_date_year, int birth_date_month, int birth_date_day);
 void DirectoryRecord_destroy(DirectoryRecord **record);
 void DirectoryRecord_print(DirectoryRecord *record);