# 编程实例
#### 实例描述
对数据实现位操作，本实例实现如下功能：
1. 某一标志位置1。
2. 获取标志位为1的最高bit位。
3. 某一标志位清0。
4. 获取标志位为1的最低bit位。
 
#### 编程示例
```
#include "los_bitmap.h"
#include "los_printf.h"
static UINT32 Bit_Sample(VOID)
{
  UINT32 flag = 0x10101010;
  UINT16 pos;
  dprintf("\nBitmap Sample!\n");
  dprintf("The flag is 0x%8x\n", flag);
  pos = 8;
  LOS_BitmapSet(&flag, pos);
  dprintf("LOS_BitmapSet:\t pos : %d, the flag is 0x%0+8x\n", pos, flag);
  pos = LOS_HighBitGet(flag);
  dprintf("LOS_HighBitGet:\t The highest one bit is %d, the flag is 0x%0+8x\n", pos, flag);
  LOS_BitmapClr(&flag, pos);
  dprintf("LOS_BitmapClr:\t pos : %d, the flag is 0x%0+8x\n", pos, flag);
  pos = LOS_LowBitGet(flag);
  dprintf("LOS_LowBitGet:\t The lowest one bit is %d, the flag is 0x%0+8x\n\n", pos, flag);
  return LOS_OK;
}
```
#### 结果验证
编译运行得到结果：
```
Bitmap Sample!
The flag is 0x10101010
LOS_BitmapSet: pos : 8,  the flag is 0x10101110
LOS_HighBitGet:The highest one bit is 28, the flag is 0x10101110
LOS_BitmapClr: pos : 28, the flag is 0x00101110
LOS_LowBitGet: The lowest one bit is 4, the flag is 0x00101110
```