Answer to Question #159671 in C++ for zain ul abdeen

Question

Create an array of user-defined size. Fill this array with random numbers (Auto Generated). Create a menu from 1 to 6 to perform an operation on the array. As the option is selected, it calls a function with appropriate parameters and return type.

1.      Average of all values.

2.      Print the array

3.      Find the minimum

4.      Find maximum

5.      Search a number

6.      Print the array in reverse order

Answer 1

#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;
int fillingArrayRandomly (int arr[], int len) {
    srand(time(NULL));
    int min, max;
    cout << "Filling the array randomly between [min, max].\n";
    cout << "min: "; cin >> min;
    cout << "max: "; cin >> max;
    for (int i = 0; i < len; i++) {
        arr[i] = min + rand() % (max - min + 1);
    }
}
int main () {
    int n;
    int array[n];
    cout << "Enter length of the array: "; cin >> n;
    
    // filling the array with random numbers
    fillingArrayRandomly(array, n);
    cout << "\n1. Average of all values.\n";
    cout << "2. Print the array.\n";
    cout << "3. Find the minimum.\n";
    cout << "4. Find the maximum.\n";
    cout << "5. Search a number.\n";
    cout << "6. Print the array in reverse order.\n";
    
    int option;
    while (true) {
        cout << "\nChoose one option from the menu and to finish the program enter nonMenuNumber. ";
        cin >> option;
        if (option == 1) {
            int sum = 0;
            for (int i = 0; i < n; i++) {
                sum += array[i];
            }
            cout << "Average of all values of the array: " << (float) sum / n;
        }
        else if (option == 2) {
            cout << "Our array: ";
            for (int i = 0; i < n; i++) {
                cout << array[i] << " ";
            }
        }
        else if (option == 3) {
            int minElement = array[0];
            for (int i = 0; i < n; i++) {
                if (minElement > array[i]) {
                    minElement == array[i];
                }
            }
            cout << "minimum element of the array: " << minElement;
        }
        else if (option == 4) {
            int maxElement = array[0];
            for (int i = 0; i < n; i++) {
                if (maxElement < array[i]) {
                    maxElement == array[i];
                }
            }
            cout << "maximum element of the array: " << maxElement;
        }
        else if (option == 5) {
            int search, index = -1;
            cout << "Enter a number for search: ";
            cin >> search;
            for (int i = 0; i < n; i++) {
                if (array[i] == search) {
                    index = i;
                    break;
                }
            }
            if (index != -1) {
                cout << search << " found in the array at a index of " << index;
            }
            else {
                cout << "Number not found.";
            }
        }
        else if (option == 6) {
            cout << "Reverse array: ";
            for (int i = n - 1; i >= 0; i--) {
                cout << array[i] << " ";
            }
        }
        else {
            cout << "program finished.";
            break;
        }
    }
}