Menu-Driven program for Phone Directory
Last Updated :
23 Mar, 2023
Problem Statement: Write a menu-driven program for using switch-case with following features:
- Store Contact numbers of people
- Search for the Contact numbers using their names
- Search for the Contact numbers using their number
- Delete a Contact number
- Update a Contact number
Examples:
Approach: The idea is to use switch case for switching the case for menu-driven program for the phonebook directory and store the contact number in the hash-map and search the contact in the hash-map in O(1) time.
Below is the implementation of the above approach:
C++14
//C++14 implementation of menu driven
//Phone Book Directory
#include <iostream>
#include <string>
#include <map>
using namespace std;
void GFG();
// Global variable for phone book directory
map<string, string> phoneBook;
// List of Inputs
string inputList[] = {"1", "cool 123456789", "y", "2", "cool", "n"};
int index = -1;
// Function to provide sample inputs
string getInput() {
index++;
return inputList[index];
}
// Function to delete a contact
void deleteContact() {
string name = getInput();
cout<<"\nEnter the contact name to be deleted:\n";
cout<<name<<endl;
if (phoneBook.count(name) > 0) {
phoneBook.erase(name);
cout << "Contact Deleted!" << endl;
}
else {
cout << "Contact not found!" << endl;
}
cout<<"Do you want to perform more operations? (y / n)\n";
char choice = getInput()[0];
cout<<choice<<endl;
if (choice == 'y' || choice == 'Y') {
GFG();
}
}
// Function to update a contact number
void updateContact() {
cout<<"\nEnter the contact name to be updated:\n";
string name = getInput();
if (phoneBook.count(name) > 0) {
cout<<"\nEnter the new contact number:";
string phone = getInput();
phoneBook[name] = phone;
cout << "Contact updated!" << endl;
}
else {
cout << "Contact not found!" << endl;
}
cout<<"Do you want to perform more operations? (y / n)\n";
char choice = getInput()[0];
cout<<choice<<endl;
if (choice == 'y' || choice == 'Y') {
GFG();
}
}
// Function to search a contact
void searchContact() {
cout<<"\nEnter the name to be searched:\n";
string name = getInput();
cout<<name<<endl;
if (phoneBook.count(name) > 0) {
cout << "Contact Found! \n" << name << " " << phoneBook[name] << endl;
}
else {
cout << "Contact not found!" << endl;
}
cout<<"Do you want to perform more operations? (y / n)\n";
char choice = getInput()[0];
cout<<choice<<endl;
if (choice == 'y' || choice == 'Y') {
GFG();
}
}
// Function to store a contact
void storeContact() {
cout<<"\nEnter the name and phone number separated by space - \n";
string namePhone = getInput();
cout<<namePhone<<endl;
int spacePos = namePhone.find(' ');
string name = namePhone.substr(0, spacePos);
string phone = namePhone.substr(spacePos + 1);
if (phoneBook.count(name) > 0) {
cout << "Contact Already exists!" << endl;
}
else {
phoneBook[name] = phone;
cout << "Contact Stored!" << endl;
}
cout<<"\nDo you want to perform more operations? (y / n)\n";
char choice = getInput()[0];
cout<<choice<<endl;
if (choice == 'y' || choice == 'Y') {
GFG();
}
}
// Main Function for Menu-Driven
void GFG() {
cout << "Please choose any choice from below -" << endl;
cout << "Store Contact number (1)" << endl;
cout << "Search Contact number (2)" << endl;
cout << "Update Contact number (3)" << endl;
cout << "Delete Contact number (4)" << endl;
int choice = stoi(getInput());
cout<<choice<<endl;
switch (choice) {
case 1:
storeContact();
break;
case 2:
searchContact();
break;
case 3:
updateContact();
break;
case 4:
deleteContact();
break;
default:
cout << "Invalid choice!" << endl;
}
}
int main() {
cout << "----------------------Welcome to GeeksforGeeks Phonebook----------------------" << endl;
GFG();
return 0;
}
//Java implementation of menu driven
//Phone Book Directory
import java.util.*;
public class PhoneBook {
public static HashMap<String, Integer> contact = new HashMap<String, Integer>();
//List of Inputs
public static List<String> inputLis = Arrays.asList("1", "cool 123456789",
"y", "2", "cool", "n");
public static int indi = -1;
// Function to provide sample inputs
// Remove this function to run on
// Custom Inputs
public static String input() {
indi += 1;
System.out.println(inputLis.get(indi));
return inputLis.get(indi);
}
// Function to delete a contact
public static void delete() {
System.out.println("Enter the contact"
+ " name to be deleted");
String name = input().strip();
if (contact.containsKey(name)) {
contact.remove(name);
System.out.println("Contact Deleted !\n");
} else {
System.out.println("Contact not found !\n");
}
System.out.println("Do you want to perform more"
+ " operations? (y / n)");
String choice = input().strip();
if (choice.equals("y")) {
main();
}
}
// Function to update a contact number
public static void update() {
System.out.println("Enter the contact name"
+ " to be updated - ");
String name = input().strip();
if (contact.containsKey(name)) {
System.out.println("Enter the new"
+ " contact number - ");
int phone = Integer.parseInt(input());
contact.put(name, phone);
System.out.println("Contact updated\n");
} else {
System.out.println("Contact not found !\n");
}
System.out.println("Do you want to perform "
+ "more operations? (y / n)");
String choice = input().strip();
if (choice.equals("y")) {
main();
}
}
// Function to search a contact
public static void search() {
System.out.println("Enter the name to be searched - ");
String name = input().strip();
if (contact.containsKey(name)) {
System.out.println("Contact Found !");
System.out.println(name + " " + contact.get(name));
} else {
System.out.println("Contact not found !\n");
}
System.out.println("Do you want to perform more"
+ " operations? (y / n)");
String choice = input().strip();
if (choice.equals("y")) {
main();
}
}
// Function to store a contact
public static void store() {
System.out.println("\n\nEnter the name"
+ " and phone number" +
" separated by space - ");
String[] namePhone = input().strip()
.split(" ");
String name = namePhone[0];
int phone = Integer.parseInt(namePhone[1]);
if (contact.containsKey(name)) {
System.out.println("Contact Already exists !\n");
} else {
contact.put(name, phone);
System.out.println("Contact Stored !");
}
System.out.println("Do you want to perform more"
+ " operations? (y / n)");
String choice = input().strip();
if (choice.equals("y")) {
main();
}
}
// Main Function for Menu-Driven
public static void main() {
System.out.println("Please choose any choice"
+ " from below -\n\n\n");
System.out.println("Store Contact number (1)");
System.out.println("Search Contact number (2)");
System.out.println("Update Contact number (3)");
System.out.println("Delete Contact number (4)");
int choice = Integer.parseInt(input());
switch (choice) {
case 1:
store();
break;
case 2:
search();
break;
case 3:
update();
break;
case 4:
delete();
break;
default:
break;
}
}
public static void main(String[] args) {
System.out.println("----------------------" +
"Welcome to GeeksforGeeks Phonebook" +
"----------------------");
main();
}
}
# Python implementation of menu driven
# Phone Book Directory
contact = {}
# List of Inputs
inputLis = ["1", "cool 123456789",
"y", "2", "cool", "n"]
indi = -1
# Function to provide sample inputs
# Remove this function to run on
# Custom Inputs
def input():
global indi
indi += 1
print(inputLis[indi])
return inputLis[indi]
# Function to delete a contact
def delete():
global contact
print("Enter the contact"\
" name to be deleted")
name = input().strip()
if name in contact:
del(contact[name])
print("Contact Deleted !\n")
else:
print("Contact not found !\n")
print("Do you want to perform more"\
" operations? (y / n)")
choice = input().strip()
if choice == "y":
main()
# Function to update a contact number
def update():
global contact
print("Enter the contact name"\
" to be updated - ")
name = input().strip()
if name in contact:
print("Enter the new"\
" contact number - ")
phone = int(input())
contact[name] = phone
print("Contact updated\n")
else:
print("Contact not found !\n")
print("Do you want to perform "\
"more operations? (y / n)")
choice = input().strip()
if choice == "y":
main()
# Function to search a contact
def search():
global contact
print("Enter the name to be searched - ")
name = input().strip()
if name in contact:
print("Contact Found !")
print(name, contact[name])
else:
print("Contact not found !\n")
print("Do you want to perform more"\
" operations? (y / n)")
choice = input().strip()
if choice == "y":
main()
# Function to store a contact
def store():
print("\n\nEnter the name"\
" and phone number"+\
" separated by space - ")
name, phone = map(str, \
input().strip()\
.split(" "))
global contact
if name in contact:
print("Contact Already exists !\n")
else:
contact[name] = phone
print("Contact Stored !")
print("Do you want to perform more"\
" operations? (y / n)")
choice = input().strip()
if choice == "y":
main()
# Main Function for Menu-Driven
def main():
print("Please choose any choice"\
" from below -\n\n\n")
print("Store Contact number (1)")
print("Search Contact number (2)")
print("Update Contact number (3)")
print("Delete Contact number (4)")
choice = int(input())
choice_dict = {
1: store,
2: search,
3: update,
4: delete
}
choice_dict[choice]()
if __name__ == "__main__":
print("----------------------"+\
"Welcome to GeeksforGeeks Phonebook"+\
"----------------------")
main()
//C# implementation of menu driven
//Phone Book Directory
using System;
using System.Collections.Generic;
public class PhoneBook
{
public static Dictionary<string, int> contact = new Dictionary<string, int>();
//List of Inputs
public static List<string> inputLis = new List<string>(){"1", "cool 123456789",
"y", "2", "cool", "n"};
public static int indi = -1;
// Function to provide sample inputs
// Remove this function to run on
// Custom Inputs
public static string input()
{
indi += 1;
Console.WriteLine(inputLis[indi]);
return inputLis[indi];
}
// Function to delete a contact
public static void delete()
{
Console.WriteLine("Enter the contact"
+ " name to be deleted");
string name = input().Trim();
if (contact.ContainsKey(name))
{
contact.Remove(name);
Console.WriteLine("Contact Deleted !\n");
}
else
{
Console.WriteLine("Contact not found !\n");
}
Console.WriteLine("Do you want to perform more"
+ " operations? (y / n)");
string choice = input().Trim();
if (choice.Equals("y"))
{
main();
}
}
// Function to update a contact number
public static void update()
{
Console.WriteLine("Enter the contact name"
+ " to be updated - ");
string name = input().Trim();
if (contact.ContainsKey(name))
{
Console.WriteLine("Enter the new"
+ " contact number - ");
int phone = Int32.Parse(input());
contact[name] = phone;
Console.WriteLine("Contact updated\n");
}
else
{
Console.WriteLine("Contact not found !\n");
}
Console.WriteLine("Do you want to perform "
+ "more operations? (y / n)");
string choice = input().Trim();
if (choice.Equals("y"))
{
main();
}
}
// Function to search a contact
public static void search()
{
Console.WriteLine("Enter the name to be searched - ");
string name = input().Trim();
if (contact.ContainsKey(name))
{
Console.WriteLine("Contact Found !");
Console.WriteLine(name + " " + contact[name]);
}
else
{
Console.WriteLine("Contact not found !\n");
}
Console.WriteLine("Do you want to perform more"
+ " operations? (y / n)");
string choice = input().Trim();
if (choice.Equals("y"))
{
main();
}
}
// Function to store a contact
public static void store()
{
Console.WriteLine("\n\nEnter the name"
+ " and phone number" +
" separated by space - ");
string[] namePhone = input().Trim().Split(" ");
string name = namePhone[0];
int phone = Int32.Parse(namePhone[1]);
if (contact.ContainsKey(name))
{
Console.WriteLine("Contact Already exists !\n");
}
else
{
contact.Add(name, phone);
Console.WriteLine("Contact Stored !");
}
Console.WriteLine("Do you want to perform more"
+ " operations? (y / n)");
string choice = input().Trim();
if (choice.Equals("y"))
{
main();
}
}
// Main Function for Menu-Driven
public static void main()
{
Console.WriteLine("Please choose any choice"
+ " from below -\n\n\n");
Console.WriteLine("Store Contact number (1)");
Console.WriteLine("Search Contact number (2)");
Console.WriteLine("Update Contact number (3)");
Console.WriteLine("Delete Contact number (4)");
int choice = Int32.Parse(input());
switch (choice)
{
case 1:
store();
break;
case 2:
search();
break;
case 3:
update();
break;
case 4:
delete();
break;
default:
break;
}
}
public static void Main(string[] args)
{
Console.WriteLine("----------------------" +
"Welcome to GeeksforGeeks Phonebook" +
"----------------------");
main();
}
}
Output:
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