pila.cpp

#include <iostream>

using namespace std;

//checks if the array is empty
bool isEmpty(int arr[], int length) {
    return(arr[length - 1] == 0);
}

//adds an element into the array
void push(int arr[], int &counter, int length) {
    if(counter == (length - 1)) {
        cout << "overflow, the stack is full." << endl;
    }else {
        cout << "insert the element to add to the stack: ";
        cin >> arr[counter];
        counter++;
    }
}

//"deletes" an element from the array
int pop(int arr[], int &counter, int length) {
    int tmp = 0;
    if(!isEmpty(arr, length)) {
        cout << "empty array" << endl;
    }else {
        tmp = arr[counter];
        arr[counter-1] = 0;
        counter--;
    }
    return(tmp);
}

void stackPrinter(int arr[], int length) {
    for (int i = 0; i < length-1; ++i) {
        cout << arr[i] << "\t";
    }
}

void menuOpzioni(int arr[], int length, int &counter) {
    int check = 1, tmp;

    while(check != 0) {
        cout << endl << "type '1' if you want to add an element to the stack" << endl
             << "type '2' if you want to delete an element from the stack" << endl
             << "type '3' if you want to check if the stack is empty" << endl
             << "type '4' if you want to print all the stack" << endl
             << "type '0' if you want to exit from the program: " << endl;
        cin >> check;

        switch (check) {
            case 1:
                push(arr, counter, length);
                break;
            case 2:
                tmp = pop(arr, counter, length);
                cout << "this is the element deleted from the stack: " << tmp;
                break;
            case 3:
                if(isEmpty(arr, length)) {
                    cout << "the stack is empty." << endl;
                }else {
                    cout << "the stack its not empty";
                }
                break;
            case 4:
                cout << endl;
                stackPrinter(arr, length);
                break;
            default:
                cout << "you've entered a wrong number!" << endl;
        }
    }
}

int main() {
    int counter = 0;
    int length;
    cout << "insert the length of the stack: ";
    cin >> length;
    int arr[length];
    arr[length - 1] = counter;

    menuOpzioni(arr, length, counter);

}