bit fields

#include <iostream>

#pragma pack(push, 1)
struct test
{
    bool b1:1;
    bool b2:1;
    bool b3:1;
    bool b4:1;

    bool b5:1;
    bool b6:1;
    bool b7:1;
    bool b8:1;
};
#pragma pack(pop)

int main()
{
    test t;

    *(bool*)(&t) = 0;

    t.b1 = 1;
    t.b2 = 0;
    t.b3 = 1;
    t.b4 = 0;
    t.b5 = 1;
    t.b6 = 0;
    t.b7 = 1;
    t.b8 = 0;

    std::cout << t.b1 << " " << t.b2 << " " << t.b3 << " " << t.b4;

    std::cin.get();
}