Fixed some segfaults due not checking for null pointers

include/account.h

@@ -20,5 +20,9 @@ typedef struct account {
 
 } Account;
 
+Account *initializeAccount(char *name, char *description);
+void updateAccountValue(Account *account, Money *value);
+void addSubAccountToAccount(Account *account, SubAccount *subaccount);
+void destroyAccount(Account *account);
 
 #endif

include/entry.h

@@ -20,6 +20,10 @@ typedef struct entry {
   struct entry *next; ///< Pointer to the next entry in the list of entries
 } Entry;
 
-
+Entry *initializeEntry(char *name, char *description);
+void setEntryValue(Entry *entry, Money *value);
+void appendEntry(Entry *entry, Entry *newEntry);
+void traverseEntry(Entry *entry);
+void destroyEntry(Entry *entry);
 
 #endif

include/money.h

@@ -19,9 +19,15 @@ typedef struct money {
   int cents; ///<   The Cents parts of the monetary value
 } Money;
 
-Money *initializeMoney(int full, int cents);
+Money *initalizeMoney(int full, int cents);
 
 void addMoneyToMoney(Money *dest, Money *src);
 void subtractMoneyToMoney(Money *dest, Money *src);
-
+bool checkOverflow(Money *m);
+bool checkUnderflow(Money *m);
+void handleOverflow(Money *m);
+void handleUnderflow(Money *m);
+void setMoneyValue(Money *m, int full, int cents);
+char *getMoneyString(Money *m);
+void destroyMoney(Money *money);
 #endif

include/subaccount.h

@@ -24,5 +24,10 @@ typedef struct subaccount {
   struct subaccount *next; ///< Reference to the next subaccount
 } SubAccount;
 
+SubAccount *initializeSubAccount(char *name, char *description);
+void updateSubAccountValue(SubAccount *subaccount, Money *value);
+void addEntryToSubAccount(SubAccount *subaccount, Entry *entry);
+void appendSubAccount(SubAccount *subaccount, SubAccount *newSubaccount);
+void destroySubAccount(SubAccount *subaccount);
 
 #endif

include/taccount.h

@@ -18,5 +18,7 @@ typedef struct taccount {
 
 } TAccount;
 
-
+TAccount *initializeTAccount();
+void destroyTAccount(TAccount *taccount);
+Account *getListAccountsPointers(TAccount *tAccount);
 #endif