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‎README.md‎

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- [tutorialspoint.com](https://www.tutorialspoint.com/cplusplus/index.htm)
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- [cplusplus.com](https://cplusplus.com/doc/tutorial/)
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- [learncpp.com](https://www.learncpp.com/)
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## Problem Solving
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```
49-
1. C++ Program to print "Hello, World!"
50-
2. C++ Program to Print an Integer (Entered by the User)
51-
3. C++ Program to Add Two Integers
52-
4. C++ Program to Multiply two Floating Point Numbers
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5. C++ Program to Find ASCII Value of a Character
54-
6. C++ Program to Compute Quotient and Remainder
55-
7. C++ Program to Find the Size of int, float, double and char
56-
8. C++ Program to Demonstrate the Working of Keyword long
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9. C++ Program to Swap Two Numbers
58-
10. C++ Program to Check Whether a Number is Even or Odd
59-
11. C++ Program to Check Whether a Character is Vowel or Consonant
60-
12. C++ Program to Find the Largest Number Among Three Numbers
61-
13. C++ Program to Find all Roots of a Quadratic equation
62-
14. C++ Program to Check Leap Year
63-
15. C++ Program to Check Whether a Number is Positive or Negative
64-
16. C++ Program to Check Whether a Character is an Alphabet or not
65-
17. C++ Program to Calculate the Sum of Natural Numbers
66-
18. C++ Program to Find Factorial of a Number
67-
19. C++ Program to Generate Multiplication Table
68-
20. C++ Program to Display Fibonacci Sequence
69-
21. C++ Program to Find GCD of two Numbers
70-
22. C++ Program to Find LCM of two Numbers
71-
23. C++ Program to Display Characters from A to Z Using Loop
72-
24. C++ Program to Count Number of Digits in an Integer
73-
25. C++ Program to Reverse a Number
74-
26. C++ Program to Calculate the Power of a Number
75-
27. C++ Program to Check Whether a Number is Palindrome or Not
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28. C++ Program to Check Whether a Number is Prime or Not
77-
29. C++ Program to Display Prime Numbers Between Two Intervals
78-
30. C++ Program to Check Armstrong Number
79-
31. C++ Program to Display Armstrong Number Between Two Intervals
80-
32. C++ Program to Display Factors of a Number
81-
33. C++ Programming Code To Create Pyramid and Structure
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34. C++ Program to Make a Simple Calculator Using switch...case
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35. C++ Program to Display Prime Numbers Between Intervals Using Function
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36. C++ Program to Check Prime or Armstrong Number Using User-defined Function
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37. C++ Program to Check Whether a Number can be Expressed as Sum of Two Prime Numbers
86-
38. C++ Program to Find the Sum of Natural Numbers using Recursion
87-
39. C++ Program to Find Factorial of a Number Using Recursion
88-
40. C++ Program to Find G.C.D Using Recursion
89-
41. C++ Program to Convert Binary Number to Decimal and vice-versa
90-
42. C++ Program to Convert Octal Number to Decimal and vice-versa
91-
43. C++ Program to Convert Binary Number to Octal and vice-versa
92-
44. C++ Program to Reverse a Sentence Using Recursion
93-
45. C++ Program to calculate the power using recursion
94-
46. C++ Program to Calculate Average Using Arrays
95-
47. C++ Program to Find Largest Element of an Array
96-
48. C++ Program to Calculate Standard Deviation
97-
49. C++ Program to Add Two Matrix Using Multi-dimensional Arrays
98-
50. C++ Program to Multiply to Matrix Using Multi-dimensional Arrays
99-
51. C++ Program to Find Transpose of a Matrix
100-
52. C++ Program to Multiply two Matrices by Passing Matrix to a Function
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53. C++ Program to Access Elements of an Array Using Pointer
102-
54. C++ Program Swap Numbers in Cyclic Order Using Call by Reference
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55. C++ Program to Find Largest Number Using Dynamic Memory Allocation
104-
56. C++ Program to Find the Frequency of Characters in a String
105-
57. C++ Program to count the number of vowels, consonants and so on
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58. C++ Program to Remove all Characters in a String Except Alphabet
107-
59. C++ Program to Find the Length of a String
108-
60. C++ Program to Concatenate Two Strings
109-
61. C++ Program to Copy String Without Using strcpy()
110-
62. C++ Program to Sort Elements in Lexicographical Order (Dictionary Order)
111-
63. C++ Program to Store Information(name, roll and marks) of a Student Using Structure
112-
64. C++ Program to Add Two Distances (in inch-feet) System Using Structures
113-
65. C++ Program to Add Two Complex Numbers by Passing Structure to a Function
114-
66. C++ Program to Calculate Difference Between Two Time Periods
115-
67. C++ Program to Store Information of Students Using Structure
116-
68. C++ Program to Store Information Using Structures with Dynamically Memory Allocation
117-
69. C++ Program to Write a Sentence to a File
118-
70. C++ Program to Read a Line From a File and Display it
119-
71. C++ Program to Display its own Source Code as Output
120-
72. C++ Programming Code To Create Pyramid and Pattern
121-
```
49+
1. 1. C++ Program to print "Hello, World!".
50+
2. C++ Program to print an integer entered by the user.
51+
3. C++ Program to Add/Subtract/Multiply/Divide Two Integers.
52+
4. C++ Program to Add/Subtract/Multiply/Divide Two Integers entered by the user.
53+
5. C++ Program to Add/Subtract/Multiply/Divide two Floating Point Numbers.
54+
6. C++ Program to Compute Quotient and Remainder.
55+
7. C++ Program to Calculate the Area and Circumference of a Circle.
56+
8. C++ Program to Calculate the Area of a Scalene Triangle.
57+
9. C++ Program to Calculate the Area of an Equilateral Triangle.
58+
10. C++ Program to Calculate the Area of Right Angle Triangle.
59+
11. C++ Program to Calculate the Area and Perimeter of a Rectangle.
60+
12. C++ Program to Calculate the Area and Perimeter of a Square.
61+
13. C++ program that converts between Celsius and Fahrenheit temperatures based on user input. You can also add conversions for Kelvin.
62+
14. C++ Program to Find ASCII Value of a Character.
63+
15. C++ Program to Find the Size of int, float, double, and char.
64+
16. C++ Program to Check Whether a Number is Even or Odd.
65+
17. C++ Program to Check Whether a Number is Positive or Negative.
66+
18. C++ Program to Check Whether a Character is a Vowel or Consonant.
67+
19. C++ Program to find the Largest Number Among Three Numbers.
68+
20. C++ Program to find if the entered year is a leap year or not.
69+
21. C++ program that allows the user to perform basic arithmetic operations (addition, subtraction, multiplication, division) on two numbers. You can also add error handling for division by zero.
70+
22. BMI Calculator: Create a program that calculates a person's Body Mass Index (BMI) based on their weight and height input. Provide a classification of whether the person is underweight, normal weight, overweight, or obese. Use cin, cout.
71+
Formula: bmi = weight / (height * height)
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| bmi < 18.5 | Underweight |
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| --- | --- |
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| bmi < 24.9 | Normal Weight |
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| bmi < 29.9 | Overweight |
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| Otherwise | Obese |
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23. Nested condition
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- Get the `age` and `membership_status` as user input. `membership_status` can be only `Y` or `y`. So, if the age is bigger or equal to 18 and if the user is a member of our shop, we provide a 10% discount, else we charge fully.
80+
- Write a simple chatbot program using nested conditions.
81+
24. Switch
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- Program to use `switch` statement. Display Monday to Sunday.
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- Program to display arithmetic operator using switch case
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25. C++ Program to Swap Two Numbers
85+
26. C++ Program to Find all Roots of a Quadratic equation
86+
27. C++ Program to Check Whether a Character is an Alphabet or not
87+
28. C++ Program to Calculate the Sum of Natural Numbers
88+
29. Program to calculate the sum of numbers from m to n.
89+
- Hint: Input two numbers m and n. Find the sum of all numbers from m to n. For example m=3 and n=8 then sum will be 3 +たす 4 +たす 5 +たす 6 +たす 7 +たす 8 =わ 33.
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30. Program to print Fibonacci series up to 100.
91+
- Hint: Fibonacci Series is 1, 1, 2, 3, 5, 8, 13, 21,...
92+
31. C++ program to print Even numbers up to 100
93+
32. C++ program to Generate a Multiplication Table.
94+
33. C++ program to Calculate the Power of a Number
95+
34. **Factorial Calculator:** Write a program that calculates the factorial of a given positive integer. Factorial of a number is the product of all positive integers from 1 to that number.
96+
35. **Prime Number Checker:** Create a program that determines whether a given number is prime or not. A prime number is a positive integer greater than 1 that has no positive divisors other than 1 and itself.
97+
36. C++ Program to Display Prime Numbers Between Two Intervals.
98+
37. Program to print stars Sequence1.
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```cpp
101+
*
102+
**
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***
104+
****
105+
*****
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```
107+
108+
38. Program to print stars Sequence2.
109+
110+
```cpp
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*
112+
**
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***
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****
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*****
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```
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118+
39. Program to print star Sequences3.
119+
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```cpp
121+
*
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***
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*****
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```
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40. Program to print Sequence4.
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```cpp
129+
*
130+
**
131+
***
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****
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*****
134+
*****
135+
****
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***
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**
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*
139+
```
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41. Sum of Numbers: Write a program that prompts the user for an integer n and then calculates the sum of all integers from 1 to n using a for or while loop. Also, calculate the sum of all even and odd numbers.
141+
42. Guess the Number Game: Create a simple game where the program picks a number (int number = 42;), and the user has to guess the number, receiving hints (higher or lower). Use a while loop to handle the game process. If the user guesses the number, stop the program and display the number of attempts made by the user.
142+
43. User Menu Interaction: Create a text menu that provides the user with several options (e.g., "1. Perform action 1", "2. Perform action 2," and so on). Use a while loop to continue the program until the user chooses the exit option (system("exit");).
143+
44. Program to display the series and find the sum of 1 + 3 + 5 + ... + n.
144+
45. Program to display the sum of the series 1 + 1/2 + 1/3 + ... + 1/n.
145+
46. Write a program to add the first seven terms of the following series using a for loop: 1/1! + 2/2! + 3/3! + ...
146+
47. C++ Program to Find GCD of Two Numbers
147+
48. C++ Program to Find LCM of Two Numbers
148+
49. C++ Program to Display Characters from A to Z Using Loop
149+
50. C++ Program to Count Number of Digits in an Integer
150+
51. C++ Program to Reverse a Number
151+
52. C++ Program to Calculate the Power of a Number
152+
54. C++ Program to Check Whether a Number is Palindrome or Not
153+
54. C++ Program to Check Armstrong Number
154+
55. C++ Program to Display Armstrong Number Between Two Intervals
155+
56. C++ Program to Convert Binary Number to Decimal and vice-versa
156+
57. C++ Program to Convert Octal Number to Decimal and vice-versa
157+
58. C++ Program to Convert Binary Numbers to Octal and vice-versa
158+
59. C++ Program to Reverse a Sentence Using Recursion
159+
50. C++ Program to calculate the power using recursion
160+
51. Write a program to calculate the area of a circle using functions.
161+
52. Simple Calculator Program: ****Create a program that acts as a basic calculator, allowing users to perform addition, subtraction, multiplication, and division. Use functions for each operation.
162+
53. Write a program to swap two values using functions.
163+
54. Write a program to convert time to minutes using functions. (input 3 variables namely hours, minutes, and seconds. Convert everything into minutes.)
164+
55. Write a program to sum the Fibonacci series up to n (input n). 1, 1, 2, 3, 5, 8, 13, ...
165+
56. Function Overloading and Default Arguments: Build a program for calculating the area and perimeter of various geometric shapes (circle, rectangle, triangle, etc.) using separate functions for each shape. Overload functions for shapes with different parameters.
166+
57. Employee Payroll: ****Design a program that calculates employee payroll, including basic salary, overtime pay, and deductions. Use functions to compute each component.
167+
58. **Student Grade Tracker:** Create a program that allows teachers to enter student grades and calculate averages, find the highest and lowest scores, and display statistics.
168+
59. **Library Management System:** Create a simple library management system where you can store and manage a list of books using arrays. Ask the user to enter the book names. You should have the function display the book names. Create a `void` function. You should have the functionality to update the book name. To do this create another function. And pass index as argument.
169+
60. C++ Program to merge two arrays
170+
61. C++ Program to search the value in the array and return its index, if the value is not found print "Item not found".
171+
62. ****Number Sorting:** Write a program that reads a list of numbers into an array and sorts them in ascending or descending order using a sorting algorithm.
172+
63. **Matrix Operations:** Write a program for basic matrix operations, such as addition, subtraction, multiplication, and transposition.
173+
64. In a small company, there are five salesmen. Each salesman is supposed to sell three products. Write a program using a 2D array to print **(Input from user)**. The total sales by each salesman and Total sales of each item.
174+
65. C++ Program to Calculate Standard Deviation
175+
66. C++ Program to Multiply two Matrices by Passing Matrix to a Function
176+
67. C++ Program to Access Elements of an Array Using Pointer
177+
68. Write a program that declares an integer variable, assigns a value to it, and then uses a pointer to print the value.
178+
69. Swap the values of two integer variables using pointers.
179+
70. Write a program that finds the sum of elements in an integer array using a pointer.
180+
71. Create a dynamic integer array and prompt the user for the array size. Fill the array with user input values.
181+
72. C++ Program Swap Numbers in Cyclic Order Using Call by Reference
182+
62. C++ Program to Find Largest Number Using Dynamic Memory Allocation
183+
63. C++ Program to Find the Frequency of Characters in a String
184+
64. C++ Program to count the number of vowels, consonants, and so on
185+
65. C++ Program to Remove all Characters in a String Except Alphabet
186+
66. C++ Program to Find the Length of a String
187+
67. C++ Program to Concatenate Two Strings
188+
68. C++ Program to Copy String Without Using `strcpy()`
189+
69. C++ Program to Sort Elements in Lexicographical Order (Dictionary Order)
190+
70. C++ Program to Store Information(name, roll, and marks) of a Student Using Structure
191+
71. C++ Program to Add Two Distances (in inch-feet) System Using Structures
192+
72. C++ Program to Add Two Complex Numbers by Passing Structure to a Function
193+
73. C++ Program to Calculate Difference Between Two Time Periods
194+
74. C++ Program to Store Information of Students Using Structure
195+
75. C++ Program to Store Information Using Structures with Dynamically Memory Allocation
196+
76. C++ Program to Write a Sentence to a File
197+
77. C++ Program to Read a Line From a File and Display it
198+
78. C++ Program to Display its own Source Code as Output
199+
79. C++ Programming Code To Create Pyramid and Pattern
200+
122201

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## Projects Ideas
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```
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1. Banking system with all banking facilities like – deposit, withdrawal, foreign exchange to any currency, availability of loans for purchasing vehicles, apartments, houses, setting up business, education loan, management of ATMs and all other features.
126-
2. Airline flight reservation system (online booking of tickets in different flights for different destinations all over the world, cancellation of tickets, clear display of cancellation amount, refund of amount after cancellation, showing availability of all flights, showing flights timings for all 7 days of a week, seats availability, seat selection for travelers by giving the complete layout of the seating arrangement inside the flights, food availability/non-availability inside the flights, change of travel dates and amount charged.)
204+
2. Airline flight reservation system (online booking of tickets on different flights for different destinations all over the world, cancellation of tickets, clear display of cancellation amount, refund of amount after cancellation, showing availability of all flights, showing flights timings for all 7 days of a week, seats availability, seat selection for travelers by giving the complete layout of the seating arrangement inside the flights, food availability/non-availability inside the flights, change of travel dates and amount charged.)
127205
3. Taxi/cab sharing
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4. University education portal (providing all information about under-graduate, post graduate and doctoral programs offered, facilities available, location & map, fee structure in all the universities)
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5. Online exam management system (with total security of identifying the students during exam, monitoring the students’ activities during the exam, selection of different questions for each student, development of a large question bank containing hundreds of questions in each subject considering all courses taught at the university)
206+
4. University education portal (providing all information about undergraduate, postgraduate and doctoral programs offered, facilities available, location & map, and fee structure in all the universities)
207+
5. Online exam management system (with total security of identifying the students during exam, monitoring the student's activities during the exam, selection of different questions for each student, development of a large question bank containing hundreds of questions in each subject considering all courses taught at the university)
130208
6. Library management system
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7. E-content management system
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8. Plagiarism checker & file management system
133211
9. Hotel reservation & management portal
134212
10. Restaurant management
135-
11. Healthcare consulting system (doctors with different specializations for consultation, hospitals with all facilities for treating different diseases & abroad - onestop portal for all consultations and treatments)
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12. Electronic health record management system with builtin security
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11. Healthcare consulting system (doctors with different specializations for consultation, hospitals with all facilities for treating different diseases & abroad - one-stop portal for all consultations and treatments)
214+
12. Electronic health record management system with built-in security
137215
13. Pharmacy - medical store management
138216
14. Blood bank system
139-
15. Online shopping and delivery system (like amazon)
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15. Online shopping and delivery system (like Amazon)
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16. Online car shopping
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17. Tourism portal
142220
18. World tourism portal
@@ -152,20 +230,20 @@
152230
28. City traffic monitoring and control system
153231
29. Police traffic violation reporting & control system
154232
30. The marriage function hall booking & food/music arrangement system
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31. Any vehicle (car, bus, heavy vehicles for parties, functions, family picnics, longdistance travel) booking portal
156-
32. Teacherassisted program writing environment for students
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31. Any vehicle (car, bus, heavy vehicles for parties, functions, family picnics, long-distance travel) booking portal
234+
32. Teacher-assisted program writing environment for students
157235
33. Doctors reservation system for patients
158236
34. Bus reservation & tracking system
159237
35. Railway booking and train tracking system
160238
36. Warehouse management system
161-
37. Courier tracking, cargo and freight transportation
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37. Courier tracking, cargo, and freight transportation
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38. Online code testing system
163241
39. Online quiz system (with total security of identifying the students during the quiz, monitoring the students’ activities during the quiz, selection of different quiz questions for each student, development of a large quiz question bank containing hundreds of quiz questions in each subject considering all courses taught at the university)
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40. Land/house/apartment rental & purchase portal
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41. Housecleaning, plumbing, electricity service & maintenance system
166244
42. Human organ transplantation management system
167245
43. Covid-19 tracking, testing, treatment & hospital management system
168-
44. Cryptocurrency trading portal (exchange) allowing trading of all crypto coins using security, confidentiality and authentication
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44. Cryptocurrency trading portal (exchange) allowing trading of all crypto coins using security, confidentiality, and authentication
169247
45. Parking management system
170-
46. Online food delivery system (linked to all restaurants in different districts in different regions in some country)
171-
```
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46. Online food delivery system (linked to all restaurants in different districts in different regions in some countries)
249+

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