根据位数取值，C语言位操运算

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#include

unsigned char read_bit_fun(unsigned char name,int begin,int num);

int main()
{
   unsigned char c;
   c=read_bit_fun(0xff,0,8);
   printf("%d\n",c);
return 0;
}

/*取位值函数定义*/
unsigned char read_bit_fun(unsigned char name,int begin,int num)
{
                        //0    1     2   3    4     5   6     7   8
unsigned char value[]={0x01,0x01,0x03,0x07,0x0f,0x1f,0x3f,0x7f,0xff};
unsigned char bit;
bit=(name>>begin)&(value[num]);
//printf("bit=%x\n",(name>>begin)&(value[num]));
return bit;
}

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