Task_21.03 (List)

#include <iostream>
#include <list>
#include <string>

using namespace std;

int main() {
    list<double> array;
    double x;
    int command;
    cout << "Printf command: \n"
         << "1 - if you want to enter number\n"
         << "2 - if you want to delete number\n"
         << "0 - if you want to finish program\n";
    cin >> command;
    while(command!=0){
        if(command == 1){
            int place;
            auto it = array.begin();
            double num;
            cout << "Enter number and place you want to put it to\n";
            cin >> num >> place;
            if(place<0){
                cout << "ERROR: NO SUCH DIRECTORY\n";
            }
            else if(place>=array.size()+1){
                cout << "ERROR: NO SUCH DIRECTORY\n";
            }
            else {
                for(int i=0; i!= place; ++i){
                    ++it;
                }
                array.insert(it, num);
            }
        }
        else{
            if(array.size()==0){
                cout << "ERROR: NO ELEMENTS TO DELETE\n";
            }
            else{
                int place;
                auto it = array.begin();
                cout << "Enter number of element you want to delete\n";
                cin >> place;
                if(place<0){
                    cout << "ERROR: NO SUCH DIRECTORY\n";
                }
                else{
                    for(int i=0; i!= place; ++i){
                        ++it;
                    }
                    array.erase(it);
                }
            }
        }
        for(auto i:array){
            cout << i << " ";
        }
        cout << "\n";
        cout << "Printf command: \n"
             << "1 - if you want to enter number\n"
             << "2 - if you want to delete number\n"
             << "0 - if you want to finish program\n";
        cin >> command;
    }
    return 0;
}