Linux终端打印字符时光标的控制和字体颜色-dsheng-ChinaUnix博客

很多人估计都有这种需求，使用printf打印输出的时候，可以指定输出在屏幕上的指定位置，这样就可以有“刷屏”的效果了，而不用滚屏。这个东西，使用 ncorses 这个库http://www.gnu.org/s/ncurses/ 应该是可以的了，这个接口作这个应该和你简单啊。不过有人觉得可能有点大材小用了。

其实终端本身也有支持一些特殊的控制字符组合“ ANSI/VT100 Terminal Control Escape Sequences” 参见这个网站，完整的都到那里去看吧。

摘录一些如下
represents the ASCII "escape" character, 0x1B. Bracketed tags represent modifiable decimal parameters; eg. {ROW} would be replaced by a row number.

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Cursor Control

Cursor Home        [{ROW};{COLUMN}H

    Sets the cursor position where subsequent text will begin. If no row/column parameters are provided (ie. [H), the cursor will move to the home position, at the upper left of the screen.

Cursor Up       [{COUNT}A

    Moves the cursor up by COUNT rows; the default count is 1.

Cursor Down       [{COUNT}B

    Moves the cursor down by COUNT rows; the default count is 1.

Cursor Forward       [{COUNT}C

    Moves the cursor forward by COUNT columns; the default count is 1.

Cursor Backward       [{COUNT}D

    Moves the cursor backward by COUNT columns; the default count is 1.

Force Cursor Position   [{ROW};{COLUMN}f

    Identical to Cursor Home.

Save Cursor       [s

    Save current cursor position.

Unsave Cursor       [u

    Restores cursor position after a Save Cursor.

Save Cursor & Attrs   7

    Save current cursor position.

Restore Cursor & Attrs   8

    Restores cursor position after a Save Cursor.

-------------------------

Erasing Text

Erase End of Line   [K

    Erases from the current cursor position to the end of the current line.

Erase Start of Line   [1K

    Erases from the current cursor position to the start of the current line.

Erase Line       [2K

    Erases the entire current line.

Erase Down       [J

    Erases the screen from the current line down to the bottom of the screen.

Erase Up       [1J

    Erases the screen from the current line up to the top of the screen.

Erase Screen       [2J

    Erases the screen with the background colour and moves the cursor to home.

-----------------------------------

Set Display Attributes

Set Attribute Mode   [{attr1};...;{attrn}m

    Sets multiple display attribute settings. The following lists standard attributes:

    0   Reset all attributes
    1   Bright
    2   Dim
    4   Underscore
    5   Blink
    7   Reverse
    8   Hidden

       Foreground Colours
    30   Black
    31   Red
    32   Green
    33   Yellow
    34   Blue
    35   Magenta
    36   Cyan
    37   White

       Background Colours
    40   Black
    41   Red
    42   Green
    43   Yellow
    44   Blue
    45   Magenta
    46   Cyan
    47   White

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其他的还有滚屏颜色的控制等

所以，简单的程序使用printf输出这个控制字符序列就可以起到控制光标和清除屏幕的作用了。比如下面这样写：

#include
void main(void) {

    printf("dddddddddd1234\n");

    printf("%c[%dD",0x1b, 3);         //光标后退3个字符
    printf("%c[%dA",0x1b, 3);         //光标向上移动3行
    printf("11111111111111111111111111111111\n");

    printf("%c[2J",0x1b);       //清除屏幕

    printf("%c[32;40m",0x1b);       //设置文字颜色为绿色，背景为黑色
    printf("绿色的字");
    printf("%c[31;42m",0x1b);      //设置文字颜色为红色，背景为绿色
    printf("红色的字");

}