Hi,
I have a c++ programming assignment that is driving me crazy. Below is the assignment.
A simple sequential file-based database is required to help people keep track of contacts. The system should be able to hold information about the following at least.
-Surname
-First name
-Email
-Telephone no.
-Type (work/personnel)
You may add more information if you wish!
The file is always ordered in increasing alphabetical order on Surname.
The following operations are required (at least)
• add new entry
• modify an entry
• delete an entry
• search for entry or entries
• list all contacts to a file for printing (the output should look “neat”)
Design and implement a simple C++ system maintaining all relevant information on file.
Please help. Here is some code I have done but I am unable to get it to work.
// Code to Add an entry
#include <iostream>
#include <fstream> // stream class to both read and write from/to files
#include <string>
using namespace std; // no need for .h after libraries when using this line
int main()
{
ifstream instream_1; // temporary
ofstream outstream_1; // contacts
ifstream instream_2; // temporary
ofstream outstream_2; // contacts
// the following six lines will create the contacts and temporary text files
ifstream instream_1; // declarations of streams instream_1 outstream_1
ofstream outstream_1;
instream_1.open("temporary.txt", ios::in); // open the streams
outstream_1.open("contacts.txt", ios:
ut);
instream_1.close(); // close the streams
outstream_1.close();
string surname_1, first_name_1, email_1, telephone_1, type_1; // string for old contacts
string surname_2, first_name_2, email_2, telephone_2, type_2; // string for new contacts
/*
outstream.open ("contacts.txt");
outstream.close();
*/
instream_1.open("temporary.txt",ios::in); // open for input operations
outstream_1.open("contacts.txt",ios:ut); // open for output operations.
instream_1>>surname_1>>first_name_1>>email_1>>telephone_1>>type_1;
cout<<"Enter Surname: ";
cin>>surname_1;
cout<<"\nEnter First Name: ";
cin>>first_name_1;
cout<<"\nEnter Email Address: ";
cin>>email_1;
cout<<"\nEnter Telephone Number: ";
cin>>telephone_1;
cout<<"\nEnter Type(Work / Personal): ";
cin>>type_1;
capital Z as sentinel is used because of its ASCII value being more than all other letters
while (surname_1 != "ZZZZZ") // 2 or more while loops are required
{
instream_1>>surname_1>>first_name_1>>email_1>>telephone_1>>type_1;
outstream_1<<surname_1<<first_name_1<<email_1<<telephone_1<<type_1;
}
while((surname_2 > surname_1))
{
instream_1>>surname_1>>first_name_1>>email_1>>telephone_1>>type_1;
outstream_1<<surname_1<<first_name_1<<email_1<<telephone_1<<type_1;
}
instream_1.close(); // the file is closed
outstream_1.close(); // the file is closed
return 0;
}
01-11-2008
