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i have problem where the address is not save to my file after i input a...

i have problem where the address is not save to my file after i input a new address and exit it


#include<string>
#include<iostream>
#include<fstream>
#include<sstream>
using namespace std;

typedef struct date {
   int day;
   int month;
   int year;
}Date;

typedef struct add {
   string building;
   string street;
   string city;
   string state;
   string zip;
}Address;

typedef struct entry {
   string firstName;
   string lastName;
   Address address;
   string phNo;
   Date birthDate;
   struct entry* next;
}AddressEntry;

class AddressBook {
public:
   AddressBook();
   AddressEntry * getFirst();
   void addEntry(AddressEntry *entry);
   void print(AddressEntry *entry);
   void search(int);
   bool deleteentry(int);
   void writeToFile();
private:
   AddressEntry * firstEntry;
};
AddressBook::AddressBook() {
   firstEntry = nullptr;
}

int newEntry(AddressBook *book);
int loadData(AddressBook *book);


int main() {
   AddressBook *aBook = new AddressBook;
   int noOfEnties = loadData(aBook);
   int choice;
   while (true) {
       cout << "1 New Entry" << endl;
       cout << "2 Search Entry by lastName" << endl;
       cout << "3 Search Entry by phone number" << endl;
       cout << "4 Delete Entry by last name" << endl;
       cout << "5 Delete entry by phone number" << endl;
       cout << "6 Exit" << endl;
       cout << "Enter your choice(1-6) :";
       cin >> choice;

       switch (choice) {
       case 1:
           newEntry(aBook);
           noOfEnties++;
           break;
       case 2:
           aBook->search(1);
           break;
       case 3:
           aBook->search(2);
           break;
       case 4:
           if (aBook->deleteentry(1))
               noOfEnties--;
           break;
       case 5:
           if (aBook->deleteentry(2))
               noOfEnties--;
           break;
       case 6:
           aBook->writeToFile();
           exit(0);
       default:
           cout << "Enter valid choice" << endl;
       }
   }

}

void AddressBook::addEntry(AddressEntry* entry) {
   if (firstEntry == nullptr)
       firstEntry = entry;
   else {
       entry->next = firstEntry;
       firstEntry = entry;
   }
}

void AddressBook::print(AddressEntry* entry) {
   cout << "Name : " << entry->firstName << " " << entry->lastName << endl;
   cout << "Address: " << entry->address.building << " " << entry->address.street << " " << entry->address.city << " " << entry->address.state << " " << entry->address.zip << endl;
   cout << "Phone number :" << entry->phNo << " ";
   cout << "Date of Birth : ";
   cout << entry->birthDate.month << " ";
   cout << entry->birthDate.day << " ";
   cout << entry->birthDate.year << endl;
}

bool AddressBook::deleteentry(int option) {
   string searchString;
   if (option == 1)
       cout << "Enter last name :";
   else
       cout << "Enter phone number :";
   cin >> searchString;
   AddressEntry *current = firstEntry;
   AddressEntry *previous = nullptr;
   while (current != nullptr) {
       if (option == 1)
           if (searchString.compare(current->lastName) == 0)
               break;
       if (option == 2)
           if (searchString.compare(current->phNo) == 0)
               break;
       previous = current;
       current = current->next;
   }
   if (current != nullptr) {
       if (previous == nullptr)
           firstEntry = firstEntry->next;
       else
           previous->next = current->next;
       return true;
   }
   else
   {
       cout << "Entry not found" << endl;
       return false;
   }
}

void AddressBook::search(int option) {
   string searchString;
   if (option == 1)
       cout << "Enter last name :";
   else
       cout << "Enter phone number :";
   cin >> searchString;
   AddressEntry *current = firstEntry;
   while (current != nullptr) {
       if (option == 1)
           if (searchString.compare(current->lastName) == 0)
               break;
       if (option == 2)
           if (searchString.compare(current->phNo) == 0)
               break;
       current = current->next;
   }
   if (current != nullptr)
       print(current);
   else
       cout << "Entry not found" << endl;
}

void AddressBook::writeToFile() {
   ofstream out;
   out.open("C:\\Users.txt");
   if (out.fail())
       cout << "Writing to file failed" << endl;
   else {
       AddressEntry *current = firstEntry;
       while (current != nullptr) {
           out << current->firstName << " ";
           out << current->lastName << " ";
           out << current->address.building << " ";
           out << current->address.street << " ";
           out << current->address.city << " ";
           out << current->address.state << " ";
           out << current->address.zip << " ";
           out << current->phNo << " ";
           out << current->birthDate.month << " ";
           out << current->birthDate.day << " ";
           out << current->birthDate.year << endl;
           current = current->next;
       }
   }
   out.close();
}
int newEntry(AddressBook *book) {
   AddressEntry *newentry = new AddressEntry;
   cout << "Enter details for new entry :" << endl;
   cout << "First Name :";
   cin >> newentry->firstName;
   cout << "Last Name :";
   cin >> newentry->lastName;
   cout << "Building :";
   cin >> newentry->address.building;
   cout << "Street :";
   cin >> newentry->address.street;
   cout << "City :";
   cin >> newentry->address.city;
   cout << "State :";
   cin >> newentry->address.state;
   cout << "Zip :";
   cin >> newentry->address.zip;
   cout << "Phone number :";
   cin >> newentry->phNo;
   cout << "DOB(MM DD YYYY) :";
   cin >> newentry->birthDate.month;
   cin >> newentry->birthDate.day;
   cin >> newentry->birthDate.year;
   book->addEntry(newentry);
   return 0;
}

int loadData(AddressBook *book) {
   ifstream in;
   int count = 0;
   in.open("Address.txt");
   string record;
   if (in.fail())
       return 0;
   else {
       while (getline(in, record)) {
           istringstream ss(record);
           AddressEntry *newEntry = new AddressEntry;
           ss >> newEntry->firstName;
           ss >> newEntry->lastName;
           ss >> newEntry->address.building;
           ss >> newEntry->address.street;
           ss >> newEntry->address.city;
           ss >> newEntry->address.state;
           ss >> newEntry->address.zip;
           ss >> newEntry->phNo;
           ss >> newEntry->birthDate.month;
           ss >> newEntry->birthDate.day;
           ss >> newEntry->birthDate.year;
           newEntry->next = nullptr;
           book->addEntry(newEntry);
           count++;
       }
   }
   in.close();
   return count;
}

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Homework Answers

Answer #1

Ok so you are doing file handling in c++ , you have to take care that your writing file name and reading file name should be same.

as in your program you are writing your data in the file "C:\\Users.txt" in the writeToFile() function

and reading the data from the file "Address.txt" in the loadData() function

so just choose only one file , you have to open the same file for the reading and writing the data. so i;ve changed this for you in the below code.

I hope it'll help you so please give positive rating :)


#include<string>
#include<iostream>
#include<fstream>
#include<sstream>
using namespace std;

typedef struct date {
int day;
int month;
int year;
}Date;

typedef struct add {
string building;
string street;
string city;
string state;
string zip;
}Address;

typedef struct entry {
string firstName;
string lastName;
Address address;
string phNo;
Date birthDate;
struct entry* next;
}AddressEntry;

class AddressBook {
public:
AddressBook();
AddressEntry * getFirst();
void addEntry(AddressEntry *entry);
void print(AddressEntry *entry);
void search(int);
bool deleteentry(int);
void writeToFile();
private:
AddressEntry * firstEntry;
};
AddressBook::AddressBook() {
firstEntry = nullptr;
}

int newEntry(AddressBook *book);
int loadData(AddressBook *book);


int main() {
AddressBook *aBook = new AddressBook;
int noOfEnties = loadData(aBook);
int choice;
while (true) {
cout << "1 New Entry" << endl;
cout << "2 Search Entry by lastName" << endl;
cout << "3 Search Entry by phone number" << endl;
cout << "4 Delete Entry by last name" << endl;
cout << "5 Delete entry by phone number" << endl;
cout << "6 Exit" << endl;
cout << "Enter your choice(1-6) :";
cin >> choice;

switch (choice) {
case 1:
newEntry(aBook);
noOfEnties++;
break;
case 2:
aBook->search(1);
break;
case 3:
aBook->search(2);
break;
case 4:
if (aBook->deleteentry(1))
noOfEnties--;
break;
case 5:
if (aBook->deleteentry(2))
noOfEnties--;
break;
case 6:
aBook->writeToFile();
exit(0);
default:
cout << "Enter valid choice" << endl;
}
}

}

void AddressBook::addEntry(AddressEntry* entry) {
if (firstEntry == nullptr)
firstEntry = entry;
else {
entry->next = firstEntry;
firstEntry = entry;
}
}

void AddressBook::print(AddressEntry* entry) {
cout << "Name : " << entry->firstName << " " << entry->lastName << endl;
cout << "Address: " << entry->address.building << " " << entry->address.street << " " << entry->address.city << " " << entry->address.state << " " << entry->address.zip << endl;
cout << "Phone number :" << entry->phNo << " ";
cout << "Date of Birth : ";
cout << entry->birthDate.month << " ";
cout << entry->birthDate.day << " ";
cout << entry->birthDate.year << endl;
}

bool AddressBook::deleteentry(int option) {
string searchString;
if (option == 1)
cout << "Enter last name :";
else
cout << "Enter phone number :";
cin >> searchString;
AddressEntry *current = firstEntry;
AddressEntry *previous = nullptr;
while (current != nullptr) {
if (option == 1)
if (searchString.compare(current->lastName) == 0)
break;
if (option == 2)
if (searchString.compare(current->phNo) == 0)
break;
previous = current;
current = current->next;
}
if (current != nullptr) {
if (previous == nullptr)
firstEntry = firstEntry->next;
else
previous->next = current->next;
return true;
}
else
{
cout << "Entry not found" << endl;
return false;
}
}

void AddressBook::search(int option) {
string searchString;
if (option == 1)
cout << "Enter last name :";
else
cout << "Enter phone number :";
cin >> searchString;
AddressEntry *current = firstEntry;
while (current != nullptr) {
if (option == 1)
if (searchString.compare(current->lastName) == 0)
break;
if (option == 2)
if (searchString.compare(current->phNo) == 0)
break;
current = current->next;
}
if (current != nullptr)
print(current);
else
cout << "Entry not found" << endl;
}

void AddressBook::writeToFile() {
ofstream out;
out.open("C:\\Users.txt");
if (out.fail())
cout << "Writing to file failed" << endl;
else {
AddressEntry *current = firstEntry;
while (current != nullptr) {
out << current->firstName << " ";
out << current->lastName << " ";
out << current->address.building << " ";
out << current->address.street << " ";
out << current->address.city << " ";
out << current->address.state << " ";
out << current->address.zip << " ";
out << current->phNo << " ";
out << current->birthDate.month << " ";
out << current->birthDate.day << " ";
out << current->birthDate.year << endl;
current = current->next;
}
}
out.close();
}
int newEntry(AddressBook *book) {
AddressEntry *newentry = new AddressEntry;
cout << "Enter details for new entry :" << endl;
cout << "First Name :";
cin >> newentry->firstName;
cout << "Last Name :";
cin >> newentry->lastName;
cout << "Building :";
cin >> newentry->address.building;
cout << "Street :";
cin >> newentry->address.street;
cout << "City :";
cin >> newentry->address.city;
cout << "State :";
cin >> newentry->address.state;
cout << "Zip :";
cin >> newentry->address.zip;
cout << "Phone number :";
cin >> newentry->phNo;
cout << "DOB(MM DD YYYY) :";
cin >> newentry->birthDate.month;
cin >> newentry->birthDate.day;
cin >> newentry->birthDate.year;
book->addEntry(newentry);
return 0;
}

int loadData(AddressBook *book) {
ifstream in;
int count = 0;
in.open("C:\\Users.txt"); // the file location is changed here
string record;
if (in.fail())
return 0;
else {
while (getline(in, record)) {
istringstream ss(record);
AddressEntry *newEntry = new AddressEntry;
ss >> newEntry->firstName;
ss >> newEntry->lastName;
ss >> newEntry->address.building;
ss >> newEntry->address.street;
ss >> newEntry->address.city;
ss >> newEntry->address.state;
ss >> newEntry->address.zip;
ss >> newEntry->phNo;
ss >> newEntry->birthDate.month;
ss >> newEntry->birthDate.day;
ss >> newEntry->birthDate.year;
newEntry->next = nullptr;
book->addEntry(newEntry);
count++;
}
}
in.close();
return count;
}

Here is the output:

As you can see after new execution i'm able to search a record which is previously entered . you can now test it.

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