#include <iostream>
#include <iomanip>

int main( void )
{
        int test_numbers[] = { -16, 16, -1, 1 };
        const int len = sizeof( test_numbers ) / sizeof( test_numbers[ 0 ] );
        for ( int i = 0; i < len; ++i ) {
                int n = test_numbers[ i ];
                unsigned u = n;
                std::cout << std::showbase;
                std::cout <<   "dec n: " << std::dec << n
                          << "; n >> 2: " << ( n >> 2 )
                          << "\thex n: " << std::hex << n
                          << "; n >> 2: " << ( n >> 2 ) << '\n';
                std::cout <<   "dec u: " << std::dec << u
                          << "; u >> 2: " << ( u >> 2 )
                          << "\thex u: " << std::hex << u
                          << "; u >> 2: " << ( u >> 2 ) << '\n';

        }
}