// main.cpp
#include <iostream>
#include "arrayUtils.h"

using namespace std;

int main()
{
    string napis = "jakis napis";
    char* nowy = resizeArray(napis, 20);
    for(short i = 0; i < 20; ++i)
        cout << nowy[i];
    cout << endl;
    delete[] nowy;
    return 0;
}

// arrayUtils.h
#ifndef ARRAYUTILS_H_INCLUDED
#define ARRAYUTILS_H_INCLUDED
#include <iostream>

using namespace std;

char* resizeArray(string, unsigned int newSize);

#endif // ARRAYUTILS_H_INCLUDED

// arrayUtils.cpp
#include "arrayUtils.h"
#include <iostream>

using namespace std;

char* resizeArray(string array, unsigned int newSize)
{
    char* new_array = new char[newSize];

    if(array.size() >= newSize)
        for(unsigned int i = 0; i < newSize; ++i)
            new_array[i] = array[i];
    else
    {
        unsigned int i = 0;
        for(i = 0; i < array.size(); ++i)
            new_array[i] = array[i];
        for(unsigned int j = i; j < newSize; ++j)
            new_array[j] = '-';
    }
    return new_array;
}