https://docs.google.com/document/d/16E5r5fmuPnOOdUCa5C8dw2_kljtU0R-7MOuA-oNq-dA/edit
#include
using namespace std;
int main()
{
char ch;
cout << "Nagybetu: "; cin >> ch;
cout << "Nagybetu: " << static_cast(ch-'A'+'a') << endl;
return 0;
}