#MmiUtil_ClearLines


##函数引用
```
#include "MmiUtil.h"

```

##函数声明
```
/* --------------------------------------------------------------------------
* FUNCTION NAME: MmiUtil_ClearLines
* DESCRIPTION:  清除指定行（多行）
* PARAMETERS:
*   start_line (in) -- 开始行
*   end_line   (in) -- 结束行
* RETURN:
* NOTES:
* ------------------------------------------------------------------------ */
void MmiUtil_ClearLines(int start_line, int end_line);

/* --------------------------------------------------------------------------
* FUNCTION NAME: MmiUtil_ClearLine
* DESCRIPTION:  清除指定行（1行）
* PARAMETERS:
*   disp_line (in) -- 要清除的行
* RETURN:
* NOTES:
* ------------------------------------------------------------------------ */
void MmiUtil_ClearLine(int disp_line);

/* --------------------------------------------------------------------------
* FUNCTION NAME: MmiUtil_UserClr
* DESCRIPTION:  清除屏幕下方显示区域（从第几行开始）
* PARAMETERS:
*   start_line (in) -- 开始行
* RETURN:
* NOTES:
* ------------------------------------------------------------------------ */
void MmiUtil_UserClr(int start_line);

/* --------------------------------------------------------------------------
* FUNCTION NAME: MmiUtil_ClearEngLines
* DESCRIPTION:  清除指定行（多行，英文小字体）
* PARAMETERS:
*   start_line (in) -- 开始行
*   end_line   (in) -- 结束行
* RETURN:
* NOTES:
* ------------------------------------------------------------------------ */
void MmiUtil_ClearEngLines(int start_line, int end_line);

/* --------------------------------------------------------------------------
* FUNCTION NAME: MmiUtil_ClearEngLines
* DESCRIPTION:  清除指定行（1行，英文小字体）
* PARAMETERS:
*   disp_line (in) -- 要清除的行
* RETURN:
* NOTES:
* ------------------------------------------------------------------------ */
void MmiUtil_ClearEngLine(int disp_line);

```
##函数返回
```

```

##Sample
```
int demo( void )
{
    MmiUtil_ClearLines(LINE1,LINE8);
    .....
    MmiUtil_ClearLine(LINE2);
    .....
    MmiUtil_UserClr(LINE3);
    .....
    
}
```

##注意事项

```
1. 
```

##延伸阅读
```
void MmiUtil_ClearLines(int start_line, int end_line)
{
        ........
        set_font(m_MmiUtil_Font);
        window(1, start_line, m_MmiUtil_Columns, end_line);
        clrscr();
        window(1, 1, m_MmiUtil_Columns, m_MmiUtil_Rows);
        ........
}
```
```
void MmiUtil_ClearLine(int disp_line)
{
    MmiUtil_ClearLines(disp_line, disp_line);
}
```
```
void MmiUtil_UserClr(int start_line)
{
    MmiUtil_ClearLines(start_line, m_MmiUtil_Rows );
}
```