c++字符串通过将二进制位左移转换成int

int main()
{
    char* data = (char*)"\x00\x00\x00\xd1";

    bool test = 1 & 0;
    unsigned int b = 0b11111111000000000000000000000000;
    unsigned int a = 209;
    a |= (data[0] << 24 & 0b11111111000000000000000000000000);
    a |= (data[1] << 16 & 0b00000000111111110000000000000000);
    a |= (data[2] << 8 & 0b00000000000000001111111100000000);
    a |= (data[3] & 0b00000000000000000000000011111111);
    std::cout << a;

    std::cout << sizeof(unsigned int);
}