//Example class
#include <iostream>
#include <vector>
#include <string>
using namespace std;
class Example {
public:
    Example()
    :i{1}, names{vector<string>{"Whatever"}}{
        //empty body
    }
    explicit Example(int x)
    : i{x},  names{vector<string>{"Whatever"}}{
        if(i < 0){
            i = 0;
        }
    }
    Example(int x, const vector<string>& s)
    : i{x}, names{s}{
        if(i < 0){
            i = 0;
        }
        if(names.size() < 1){
            names.push_back("Whatever");
        }
    }
    void print(){
        cout << "i: " << i << "names size: " << names.size() << endl;
    }
    string getName(size_t position)const {
        string result{};
        if(position < names.size() && position >= 0){
            result = names[position];
        }
        return result;
    }
    void addName(const string& name){
        if(name.size() > 0){
           names.push_back(name);
        }
    }
    void replace(size_t position, const string& name){
        if(position < names.size()){
            names[position] = name;
        }
    }
    size_t count() const{
        return names.size();
    }

private:
    int i{};
    vector<string> names{};
    };
    void printAll(const vector<Example>& list){
        for(const Example& f : list){
            for(size_t i{0}; i < f.count();  i += 1){
                cout << f.getName(i) << endl;
            }
        }
    }
    void testExample(){
        Example a{};
        Example b{3};
        Example c{5, vector<string>{"abc", "def"}};
        a.print();
        b.print();
        c.print();
        vector<Example> ve1{a,b,c};
        vector<Example> ve2{Example{}, Example{1}, Example{2, vector<string>{"a","b","c"}}};
        cout <<"===================" << endl;
        ve2[2].replace(0, "betty");
        for(Example e: ve2){
            cout << e.getName(0) << ' ';
            e.print();
        }
        printAll(ve2);
    }
int main()
{
    testExample();
    cout << "Hello world!" << endl;
    return 0;
}