Phonebook Management System in C

				
					#include <stdio.h>
#include <conio.h>
#include <windows.h>
#include <dos.h>
#include <string.h>

void printBars()
{
	// To print bars
	int i;
	for (i = 0; i <= 20; i++)
	{
		Sleep(60);
		printf("\xDB");
	}
}

void searchContact()
{
	FILE *fptr; // Creating file pointer
	int found = 0, result;
	char name[100], address[100], email[100], gender[10], searchName[100];
	long long int phoneNumber;
	system("cls");
	fflush(stdin);
	printf("Enter person name you want to search = ");
	scanf("%s", &searchName);
	fptr = fopen("phonerecord.txt", "r"); // Opening in read mode
	while (fscanf(fptr, "%s %s %s %s %lld\n", name, address, gender, email, &phoneNumber) != EOF)
	{
		result = strcmp(name, searchName);
		// Comparing strings, if 0 means equal
		if (result == 0)
		{
			found = 1;
			printf("Name -> %s\n", name);
			printf("Address -> %s\n", address);
			printf("Gender -> %s\n", gender);
			printf("Email -> %s\n", email);
			printf("Phone number -> %d\n", phoneNumber);
			printf("\n-----------------\n");
		}
	}
	if (found == 0)
	{
		printf("Person does not exists.\n");
	}
	Sleep(1500);
	printf("\n\nPress ENTER to Continue");
	getch();
	menu();
}

void listAllContacts()
{
	FILE *fptr; // Creating file pointer
	char name[100], address[100], email[100], gender[10];
	long long int phoneNumber;
	system("cls");
	fflush(stdin);
	fptr = fopen("phonerecord.txt", "r"); // Opening in read mode
	while (fscanf(fptr, "%s %s %s %s %lld\n", name, address, gender, email, &phoneNumber) != EOF)
	{
		printf("Name -> %s\n", name);
		printf("Address -> %s\n", address);
		printf("Gender -> %s\n", gender);
		printf("Email -> %s\n", email);
		printf("Phone number -> %d\n", phoneNumber);
		printf("\n-------------\n");
	}
	printf("\n\nPress ENTER to go to main menu.");
	getch();
	menu();
}

void deleteContact()
{
	FILE *fptr, *fptr1; // Creating 2 files, one for read and other for write.
	char name[100], address[100], email[100], gender[10], searchName[100];
	int result, found = 0;
	long long int phoneNumber;
	fptr = fopen("phonerecord.txt", "r");	   // Reading
	fptr1 = fopen("phonerecordTEMP.txt", "a"); // Temporary file for writing data
	system("cls");
	printf("Enter the CONTACT name that you want to delete: ");
	scanf("%s", &searchName);
	system("cls");
	while (fscanf(fptr, "%s %s %s %s %lld\n", name, address, gender, email, &phoneNumber) != EOF)
	{
		result = strcmp(name, searchName);
		if (result == 0)
		{
			found = 1;
			printf("Record deleted successfully");
		}
		else
		{
			fprintf(fptr1, "%s %s %s %s %lld\n", name, address, gender, email, phoneNumber);
		}
	}
	if (found == 0)
	{
		printf("Record Not found.");
	}
	fclose(fptr);
	fclose(fptr1);
	fptr = fopen("phonerecord.txt", "w");
	fclose(fptr);
	fptr = fopen("phonerecord.txt", "a");
	fptr1 = fopen("phonerecordTEMP.txt", "r");
	while (fscanf(fptr1, "%s %s %s %s %lld\n", name, address, gender, email, &phoneNumber) != EOF)
	{
		fprintf(fptr, "%s %s %s %s %lld\n", name, address, gender, email, phoneNumber);
	}
	fclose(fptr);
	fclose(fptr1);
	fptr1 = fopen("phonerecordTEMP.txt", "w");
	fclose(fptr1);
	printf("\n\nPress ENTER for main menu\n");
	getch();
	menu();
}

void createContact()
{
	system("cls");
	printf("---------------------CREATE NEW CONTACT---------------------\n\n");
	FILE *fptr; // Creating file pointer
	char name[100], address[100], email[100], gender[10];
	long long int phoneNumber;

	// Opening file in ab+ mode to help us
	// appending data and not overwriting them
	fptr = fopen("phonerecord.txt", "ab+");
	if (fptr == NULL)
	{
		printf("Cannot create phonerecord.txt. Please check permissions");
		fclose(fptr); // Closing the file
		Sleep(1000);
	}
	else
	{
		printf("Enter name -> ");
		scanf("%s", &name);
		printf("Enter %s's address ->", name);
		scanf("%s", &address);
		printf("Enter %s's gender -> ", name);
		scanf("%s", &gender);
		printf("Enter %s's email -> ", name);
		scanf("%s", &email);
		printf("Enter %s's phone number -> ", name);
		scanf("%lld", &phoneNumber);
		printf("Phone number %lld1", phoneNumber);

		// Adding data into file
		fprintf(fptr, "%s %s %s %s %lld\n", name, address, gender, email, phoneNumber); // Appending data to file
		fclose(fptr);																	// Closing the file
		printf("\n\n\nContact added to record. Press ENTER to continue.");
		getch();
		system("cls");
	}
	menu();
}

void menu()
{
	int choice;
	system("cls");
	printf("---------------------MY PHONEBOOK DIRECTORY---------------------\n\n");
	printf("1. Add Contact\n");
	printf("2. Search Contact\n");
	printf("3. List all Contacts\n");
	printf("4. Delete Contact\n");
	printf("5. Exit\n");
	printf("Enter your choice = ");
	scanf("%d", &choice);

	// Starting switch case upon choice entered by user
	switch (choice)
	{
	case 1:
		createContact();
		break;
	case 2:
		searchContact();
		break;
	case 3:
		listAllContacts();
		break;
	case 4:
		deleteContact();
		break;
	case 5:
		system("cls");
		printf("\n-----------THANKYOU FOR USING PHONEBOOK.-----------\n\n\n\n");
		Sleep(1000);
		break;
	default:
		printf("Invalid Option choosen");
		Sleep(1500);
		system("cls");
		menu();
	}
}

void askPassword()
{
	char password[20] = {"codeanddebug"};
	int i, l;
	char title[50] = "Authorized User Only";
	l = strlen(title);
	printBars();
	for (i = 0; i <= l; i++)
	{
		Sleep(60);
		printf(" %c", title[i]);
	}
	printBars();
	printf("\n\nEnter your password: ");
	char ch, pass[20];
	char w = '*';
	i = 0;
	while (ch != 13)
	{
		ch = getch(); // Getting character by character
		if (ch != 13 && ch != 8)
		{
			printf("%c", w); // Printing * when each character typed
			pass[i] = ch;	 // Storing that character in our pass
			i++;
		}
	}
	pass[i] = '\0'; // Ending password entered by user by NULL

	// Comparing Password
	if (strcmp(pass, password) == 0)
	{
		printf("\n\nPassword entered is correct.");
		Sleep(1500);
		menu(); // Then showing the menu
	}
	else
	{
		printf("\n\nPassword entered is incorrect.");
		Sleep(1500);
		system("cls"); // Clearing the whole screen
		askPassword(); // Then running our whole function again
	}
}

int main()
{
	askPassword();
}