typedef union
 {
  unsigned char Container;
  struct {
	unsigned char Bit_0 : 1;  
	unsigned char Bit_1 : 1;  
	unsigned char Bit_2 : 1;  
	unsigned char Bit_3 : 1;  
	unsigned char Bit_4 : 1;  
	unsigned char Bit_5 : 1;  
	unsigned char Bit_6 : 1;  
	unsigned char Bit_7 : 1;  
  }sub_union;
 }type_Bit_Array;
// Создаю массив бит
type_Bit_Array Bit_Array;
// Макросы для удобства обращения к битам
#define ALL_BITS_ARRAY  Bit_Array.Container	 
#define BIT_0  Bit_Array.sub_union.Bit_0	 
#define BIT_1  Bit_Array.sub_union.Bit_1	 
#define BIT_2  Bit_Array.sub_union.Bit_2	 
#define BIT_3  Bit_Array.sub_union.Bit_3	 
#define BIT_4  Bit_Array.sub_union.Bit_4	 
#define BIT_5  Bit_Array.sub_union.Bit_5	 
#define BIT_6  Bit_Array.sub_union.Bit_6	 
#define BIT_7  Bit_Array.sub_union.Bit_7	 
int main()
{
 ALL_BITS_ARRAY=0;  // Сразу 0 во все биты 
 BIT_7 = 1;         // Пример обращение к конкретному биту
 return 0;
}