#include <iostream>
#include <iomanip>
#include <string>

using namespace std;

void PrintAry(const string ary[], size_t size);
void Expand(string * & ary, size_t size, size_t capacity);
void Add(string * ary, size_t & size, size_t capacity, string word);


int main() {
    string * ary{nullptr};
    size_t size{0};
    size_t capacity{2};

    Expand(ary, size, capacity);
    Add(ary, size, capacity, "hello");
    Add(ary, size, capacity, "world");
    Add(ary, size, capacity, "today");

    PrintAry(ary, size);

    cout << endl << endl;
    cout << "Increasing capacity" << endl;
    capacity = 10;
    Expand(ary, size, capacity);
    Add(ary, size, capacity, "new");
    Add(ary, size, capacity, "entry");
    PrintAry(ary, size);

    delete [] ary;
    return 0;
}

void PrintAry(const string ary[], size_t size ){
   size_t i;
   for(i = 0; i < size; ++i) {
       cout << ary[i] << endl;
   }
}
void Expand(string *& ary, size_t size, size_t capacity){
    string * tmp = new string[capacity];
    size_t i;

    for(i = 0; i < size; ++i) {
       tmp[i] = ary[i];
    }

    if (ary != nullptr) {
        delete [] ary;
    }
    ary = tmp;
}   

void Add(string * ary, size_t & size, size_t capacity, string word){
    if(size < capacity) {
        ary[size] = word;
        ++size;
    } else {
        cerr << "Warning, " << word << " not added, capacity exceeded " << endl;
    }
}