特定位清零-C语言

//特定位清零 
#include <stdio.h>
int main()
{
	int a = 0xff30;
	//bit15清零 
	a &= ~(1 << 15);
	//bit15-bit23清零 
	a &= ~(0x1ff << 15);
	printf("a = %#x\n", a);
	return 0; 	
}