掌握C语言划横线技巧，轻松实现文本高亮排版

在C言语编程中，实现文本的高亮排版是一个罕见的须要，尤其是在文本编辑器或许命令行界面顺序中。以下是一些利用C言语实现文本划横线高亮排版的技能跟方法。

1. 利用ANSI本义序列

ANSI本义序列是一种广泛利用的字符序列，可能用来在支撑ANSI本义序列的终端中改变文本的表现属性。以下是一个利用ANSI本义序列为文本增加下划线的例子：

#include <stdio.h>

int main() {
    printf("\033[4m文本高亮\033[0m\n"); // \033[4m 开启下划线，\033[0m 重置全部属性
    return 0;
}

鄙人面的代码中，\033[4m 用于开启下划线，\033[0m 用于重置文本的全部属性（包含下划线）。

2. 利用终端库函数

假如你的顺序须要运转在支撑POSIX标准的体系上，可能利用termios跟ioctl等库函数来把持终端的属性。以下是一个利用termios库函数设置终端属性并增加下划线的例子：

”`c #include #include #include

void enable_underline() {

struct termios ttystate;
tcgetattr(STDOUT_FILENO, &ttystate);
ttystate.c_lflag |= ECHO | ISIG;
ttystate.c_lflag &= ~(ICANON);
ttystate.c_cc[VMIN] = 1;
ttystate.c_cc[VTIME] = 0;
ttystate.c_ostate &= ~OPOST;
ttystate.c_cc[ONLRET] = 0;
ttystate.c_cc[OLCUC] = 0;
ttystate.c_iflag &= ~(IXON | IXOFF | IXANY);
ttystate.c_iflag &= ~(INLCR | IGNCR);
ttystate.c_oflag &= ~(OPOST | ONLCR | OCRNL);
ttystate.c_oflag &= ~(ONOCR | ONLRET);
ttystate.c_oflag |= OLCUC;
ttystate.c_oflag |= ONOCR;
ttystate.c_oflag |= ONLRET;
ttystate.c_oflag |= OPOST;
ttystate.c_iflag |= (INLCR | IGNCR);
ttystate.c_oflag |= (ONLCR | OCRNL);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_iflag |= (IXON | IXOFF | IXANY);
ttystate.c_iflag |= (INLCR | IGNCR);
ttystate.c_oflag |= (ONLCR | OCRNL);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_iflag |= (IXON | IXOFF | IXANY);
ttystate.c_iflag |= (INLCR | IGNCR);
ttystate.c_oflag |= (ONLCR | OCRNL);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c_oflag |= (ONOCR | ONLRET);
ttystate.c_oflag |= (OLCUC | OPOST);
ttystate.c