实现位操作

//实现对一个8bit数据(unsigned char类型)的指定位的置0或者置1操作，并保持其他位不变

<span style="font-size:18px;">#include<stdio.h>void bit_set(unsigned char *p_data,unsigned char position,int flag){unsigned char bit=1<<(position-1);if(flag)//置1操作{*p_data=*p_data | bit;}else//置0操作{*p_data=*p_data & ~(bit);}} int main(){unsigned char val=13;bit_set(&val,2,1);printf("%d\n",val);return 0;}</span>