[C++] A easy way to check bits of int

In c++ we can use bit set to check the binary formation of a int value.

int a = -1;
std::bitset<32> b(a);
cout << b << endl;

The output

11111111111111111111111111111111

We also can loop every bits and output it.

void binary_formation(int x) {
    for (int i = 31; i >= 0; --i) {
        cout << (((1 << i) & x) ? 1 : 0);
    }
    cout << endl;
}