#include <iostream>

using namespace std;

void convertCase(string &text)
{
    unsigned d = text.size();

    cout << &text << endl;

    for(unsigned i = 0; i < d; ++i)
    {
        if(text[i] >= 'A' && text[i] <= 'Z')
            text[i] += 32;
        else if(text[i] >= 'a' && text[i] <= 'z')
            text[i] -= 32;
    }
}

int main()
{
    string tekst = "Ala ma Kota";

    cout << &tekst << endl;
    cout << tekst << endl;

    convertCase(tekst);

    cout << tekst << endl;
    return 0;
}