Question

Write a program in C++:

Using classes, design an online address book to keep track of the names first and last, addresses, phone numbers, and dates of birth.

The menu driven program should perform the following operations:

• Load the data into the address book from a file
• Write the data in the address book to a file
• Search for a person by last name or phone number (one function to do both)
• Add a new entry to the address book
• Delete an entry from the address book based on a phone number or last name
• input file has only unique records
• Implement address book as un-ordered linked list
• No error checking of the data in the input file needed
• All records in the input file unique, no duplicates

Sample of a record

Steve Brown 4592 Raleigh Seathle WA 98001

Record format

• one record per line, items separated by a blank space
• First and last Names are one word each
• building number: one word (4592)
• street name : one word, no str. blvd. etc (Raleigh)
• city: one word (Seatle)
• phone: 10 digits, no formatting characters (2065551987)
• birth date: 05 10 2001 ( month, day, year), no formatting characters

Answer 1

CODE:

#include<iostream> //for cin and cout
#include<fstream> //for ifstream and cfstream to work with files
using namespace std;
//record class consists of attributes of person and next pointer
class record{
public:
string fname,lname,bnumber,stname,city,phone,bdate;
struct record *next;
};
//addressBook class has all the operations to be done on records
class addressBook{
public:
record *root;
addressBook(){
root=NULL;
}
//loads Data from file and generates linked list
void loadData(){
ifstream in;
in.open("input.txt");
if(in==NULL){
cout<<"error: unable to open input file";
return;
}
record *dummy=NULL;
root=new record;
dummy = root;
while(true){
record *p=NULL;
p=new record;
if(in>>p->fname>>p->lname>>p->bnumber>>p->stname>>p->city>>p->phone>>p->bdate){
dummy->next = p;
p->next=NULL;
dummy = p;
}else break;
}
root = root->next;
in.close();
cout<<"Data loaded!!";
}
//writes data from linked list to file
void writeData(){
ofstream out;
out.open("input.txt");
if(out==NULL){
cout<<"error: unable to open file to write data";
return;
}
record *p = root;
while(p){
out<<p->fname<<' '<<p->lname<<' '<<p->bnumber<<' ';
out<<p->stname<<' '<<p->city<<' '<<p->phone<<' '<<p->bdate<<'\n';
p=p->next;
}
out.close();
cout<<"Data written into file successfully";
}
//search for the string in the linked list
void search(string s){
record *p = root;
while(p){
if(p->lname==s||p->phone==s){
cout<<"Name: "<<p->fname<<' '<<p->lname<<endl;
cout<<"Building number: "<<p->bnumber<<endl;
cout<<"Street name: "<<p->stname<<endl;
cout<<"City: "<<p->city<<endl;
cout<<"Phone number: "<<p->phone<<endl;
cout<<"Birth date: "<<p->bdate<<endl;
return;
}
p=p->next;
}
cout<<"\nNo record found";
}
//adds new record to linked list
void add(){
record *p=NULL;
p=new record;
cout<<"Enter first name: ";
cin>>p->fname;
cout<<"Enter last name: ";
cin>>p->lname;
cout<<"Enter building number: ";
cin>>p->bnumber;
cout<<"Enter street name: ";
cin>>p->stname;
cout<<"Enter city: ";
cin>>p->city;
cout<<"Enter Phone number: ";
cin>>p->phone;
cout<<"Enter Birth date: ";
cin>>p->bdate;
p->next = root;
root=p;
cout<<"\nRecord added successfully";
}
//deletes record from linked list with lastname or phone number as s
void delet(string s){
record *p=NULL,*c=root;
while(c&&(c->lname==s||c->phone==s)){
p=c;
c=c->next;
}
if(p&&c){
p=c->next;
cout<<"Record deleted successfully";
}else if(p==NULL){
root=root->next;
cout<<"Record deleted successfully";
}
else cout<<"No record found. Deletion failed";
}
};
//menu displays the options to user.
void menu()
{
cout<<"\n1. Search for a person by last name or phone number\n";
cout<<"2. Add a new entry\n3. Delete an entry based on phone number or lastname\n";
cout<<"4. exit\n";
}

//main function implementation
int main()
{
addressBook ab; //created an object for class addressBook
ab.loadData(); //calls loadData function initially

int choice=0; //to store the user input
while(choice!=4){ //until user enters 4 the loop continues
menu();
cout<<"Enter choice: ";
cin>>choice;
if(choice==1){
cout<<"Enter last name or phone number: ";
string s;
cin>>s;
ab.search(s);
}
else if(choice==2){
ab.add();
}
else if(choice==3){
cout<<"Enter last name or phone number: ";
string s;
cin>>s;
ab.delet(s);
}
}
ab.writeData(); //calls writeData function
cout<<"\nBye!!";
return 0;
}

//input.txt before execution

input Notepad File Edit Format View Help John Doe 8798 walnutstreet california 8787329982 03121987 Steven Fincher 4932 Victory Reseda 818612343 07201965

//input.txt after execution

File Edit Format View Help James Winger 2412 Rage Washington 9483984933 02121984 Steven Fincher 4932 Victory Reseda 818612343 07201965

//output screenshots

CAC&C++cplus\bin\Debuglcplus.exe Data 1oaded!! 1. Search for a person by last name or phone number 2. Add a new entry 3. Delete an entry based on phone number or lastname . exit Enter choice: 1 Enter last name or phone number: Doe Name: John Doe Building number: 8798 Street name: walnutstreet City: california Phone number: 8787329982 Birth date: 03121987 1. Search for a person by last name or phone number 2. Add a new entry 3. Delete an entry based on phone number or lastname . exit Enter choice: 3 Enter last name or phone number: Fincher Record deleted successfully 1. Search for a person by last name or phone number 2. Add a new entry 3. Delete an entry based on phone number or lastname . exit Enter choice: 2 Enter first name: James Enter last name: Wingen Enter building number: 2412 Enter street name: Rage Enter city: Washington Enter Phone number: 9483984933 Enter Birth date: 02121984 Record added successfully 1. Search for a person by last name or phone number 2. Add a new entry 3. Delete an entry based on phone number or lastname . exit

Enter choice: 4 Bye!! Process returned e (x execution time65.751 s Press any key to continue