10.c

#include 

int main(void)
{
	int a = 0xff;
	
	printf("a = %#x \n", a);	//11111111 
	printf("a = %#x \n", a >> 1);	//01111111
	printf("a = %#x \n", a >>= 1);	//01111111
//						   ^a = a >> 1;
	printf("a = %#x \n", a >>= 1);	//00111111
	printf("a = %#x \n", a >>= 1);	//00011111	

	printf("a = %d \n", a <<= 1);	// << 1 ==> *2^1
	printf("a = %d \n", a <<= 1);	// << 2 ==> *2^2
	printf("a = %d \n", a <<= 1);

	a = 0xffff;
	printf("a = %#x \n", ~a);		//0xffff0000
	
	a = 0x35;						//00110101
	printf("a = %#x \n", a | 0x18);	//00011000
									//00111101

	a = 0x35;						//00110101
	printf("a = %#x \n", a & 0x18);	//00011000
									//00010000
	
	a = 0x35;						//00110101
	printf("a = %#x \n", a ^ 0x18);	//00011000
									//00101101	0x2d

	a = 0x35;
	printf("a = %#x \n", a | 0x80);		//10110101
	printf("a = %#x \n", a |= (1 << 7));	//置1;
//						   ^ a = a | (1 << 7)
//	printf("a = %#x \n", a & (0 << 7));	//0
	printf("a = %#x \n", a & 0x7f);	//01111111
	printf("a = %#x \n", a & ~(1 << 7));	//清0;

//	取出某一位; 	
	printf("a = %#x \n", a & (1 << 7));	//值为真; 该位有数;
	
	return 0;
}