List

#include <iostream>
#include <vector>
#include <iomanip>

using namespace std;

int main() {
    char choice{};
    bool work{ true };
    vector <int> list{};
    double mean{};
    int sum{};
    int temporary_number_memory;
    do {
        cout << "P - print numbers" << endl;
        cout << "A - add a number" << endl;
        cout << "M - Display mean of the numbers" << endl;
        cout << "S - Display the smallest number" << endl;
        cout << "L - Display the largest number" << endl;
        cout << "Q - Quit" << endl;
        cout << endl << "Enter your choice: ";
        cin >> choice;
        switch (choice) {
        case 'P':
        case 'p':
            if (list.size() > 0) {
                cout << "Your list:" << endl << "[ ";
                for (auto values : list) cout << values << " ";
                cout << "]" << endl;
            }
            else cout << endl << "[] - Your list is empty!" << endl;
            break;
        case 'A':
        case 'a':
            cout << "Enter an integer to add to the list: ";
            cin >> temporary_number_memory;
            list.push_back(temporary_number_memory);
            cout << endl << "Number " << temporary_number_memory << " - Succesfully added to the list" << endl;
            break;
        case 'M':
        case 'm':
            for (auto values : list) sum += values;
            mean = static_cast <double>(sum) / list.size();
            cout << fixed << setprecision(2); // dwa miejsca po przecinku
            cout << "Mean of the list is: " << mean << endl << endl;
            break;
        case 'S':
        case 's':
        {
            int smallest_number{};
            if (list.size() > 0) {
                smallest_number = list.at(0);
                for (auto values : list) {
                    if (smallest_number > values) smallest_number = values;
                }
                cout << "The smallest number in the list is " << smallest_number << endl << endl;
            }
            else cout << "---------------------------------\nERROR!!!\nThere are no numbers in the list!!!\n";
            break;
        }
        case 'L':
        case 'l':
        {
            int largest_number{};
            if (list.size() > 0) {
                largest_number = list.at(0);
                for (auto values : list) {
                    if (largest_number < values) largest_number = values;
                }
                cout << "The largest number in the list is " << largest_number << endl << endl;
            }
            else cout << "---------------------------------\nERROR!!!\nThere are no numbers in the list!!!\n";
            break;
        }
        case 'Q':
        case 'q':
            work = false;
            break;
        }
    } while (work);
}