位操作赋值与清零

#include <stdio.h>

#define SetBit(c, n)	c |= (1 << n)
#define ClrBit(c, n)	c &= ~(1 << n)

void main()
{
	unsigned char t = 0x00;
	printf("t = %02x\n", t);
	SetBit(t, 2);
	printf("t = %02x\n", t);
	ClrBit(t, 2);
	printf("t = %02x\n", t);
}