Counting People Who Can Watch the Movie in C++

Introduction:

Some movies have restrictions such as having age limits and even limiting the number of seats available in a movie theatre. So, on the basis of these criteria, can we figure out how many people can possibly watch the movie?

We will speak about this issue by focusing on how to design an application to count eligible users in a group using C++. However, first, we will discuss the criteria for eligibility.

Problem Statement:

There are two constraints for viewing a movie. Therefore, this set of people would like to establish whether it is or isn't possible to watch a movie:

1. Age Restriction: A movie has a cut-off policy on audience age.
2. Seating Capacity: The total number of seats in the theatre is limited.

Write a program that will determine the number of people from the group above the minimum age of the movie to view it when the number of people required to watch the movie is known.

Solution Approach:

In order to help us with the problem, we will work as follows:

1. Input Details: Fetch the relevant information, such as group numbers or the ages of the groups, the allowable age limit, and the greatest number of seats allowed.
2. Filter Eligible People: Establish the number of individuals that qualify for the minimum age requirement set.
3. Take into consideration seating limit: Determine the number of people who are entitled to attend the meeting and check if there are enough seats available. If there are insufficient seats, make the necessary changes.
4. Output: Print the number of people who can watch the movie.

Example 1:

Let us take an example to illustrate how to count people who can watch the movie in C++.

Output:

Enter the number of people in the group: 6  
Enter the minimum age required for the movie: 18  
Enter the seating capacity of the theater: 4  
Enter the ages of the group members: 16 21 18 17 25 19  
Number of people who can watch the movie: 4    

Out of this group of six people, four are able to access the service's age-restricted components (21, 18, 25 and 19). The restriction placed by the console limits us to x4 people, meaning only four are able to benefit from this service.

Explanation of the code:

1. Input Information: The program accepts inputs, such as the number of users, their ages, the lowest age limit to be accepted, and the theatre capacity.
2. Age Verification: The entire group's ages are verified for meeting the minimum requirements needed.
3. Seating Optimization: The use of the min() function protects the theatre seating arrangement by placing a restriction on the number of users permitted into the designated auditorium.
4. Result: The output from the program is the number of people that were computed to be able to view the movie within the stipulated constraints.

Example 2:

Let us take another example to illustrate how to count people who can watch the movie in C++.

Output:

Enter the number of people in the group: 10
Enter the minimum age required for the movie: 13
Enter the seating capacity of the theater: 200
Enter the ages of the group members:
Person 1 age: 22
Person 2 age: 10
Person 3 age: 23
Person 4 age: 32
Person 5 age: 33
Person 6 age: 58
Person 7 age: 62
Person 8 age: 9
Person 9 age: 13
Person 10 age: 18

Summary:
Total group members: 10
Minimum age required: 13
Seating capacity: 200
Number of eligible people: 8
Number of people who can watch the movie: 8

Detailed Report:
        ID       Age       Eligible  Seat Assigned
--------------------------------------------------
         7        62            Yes            Yes
         6        58            Yes            Yes
         5        33            Yes            Yes
         4        32            Yes            Yes
         3        23            Yes            Yes
         1        22            Yes            Yes
        10        18            Yes            Yes
         9        13            Yes            Yes
         2        10             No             No
         8         9             No             No   

Explanation of the Code:

1. Person Struct
   The unique attributes of a person, such as age, ID (person number) and eligibility (age requirement), are embedded in a specific structure called a Person.
2. Sorting Eligible Members
   The group is sorted in eligible and non-eligible members based on age. The people who qualify the age criteria are at the front of the line and among them older people always get the first priority for empty seats.
3. Detailed Report
   After the data is processed, a computed report follows that shows each person's age, eligibility and whether a seat was assigned.
4. Flexible and Scalable
   Programs of this kind elegantly tackle edge cases like insufficient seats or lack of eligible people.
   • Sorting and Priority: Prioritizing older eligible people.
   • Scalability: It handles larger groups and provides better insights about the assignment of seats and eligibility.
   • Detailed Reporting: Adjustable reporting that shows each person's eligibility and seat assignment.
   • Edge Case Handling: Cases such as few eligible viewers and less seating arrangements are handled easily.

Example 3:

Let us take another example to illustrate how to count people who can watch the movie in C++.

Output:

Enter the number of people in the group: 7
Enter the minimum age required for the movie: 18
Enter the seating capacity of the theater: 4
Enter the ages of the group members:
16 20 18 25 19 17 22
Number of people who can watch the movie: 4
Ages of people assigned seats: 25, 22, 20, 19   

Explanation:

1. Filtering Ages:
   Only the ages of people meeting the minimum age requirement are added to the eligibleAges vector.
2. Sorting:
   Ages are sorted in ascending order to ensure the stack's top contains the oldest eligible person.
3. Using a Stack:
   Eligible ages are pushed onto the stack. It ensures the oldest people (highest priority) are at the top of the stack.
4. Seat Assignment:
   The program pops elements from the stack until the seating capacity is reached, assigning seats to the oldest eligible people.
5. Output:
   The program outputs the number of people who can watch the movie and their ages in order of seat assignment.

Conclusion:

With the help of this C++ program, users are able to accurately estimate the number of people who are eligible to view a movie based on age criteria and available seating. The logic is straightforward but has numerous applications in the real world for eligibility and resource limitations.