转义序列 \f - 换页 - 它到底是什么？
\f 被认为是换页符。 \t 是制表符，\a 是蜂鸣声，\n 是换行符。换页符到底是什么 - \f？以下程序
#include <iostream>
int main()
{
std::cout << "hello\fgoodbye" << std::endl;
}
打印hello，然后打印女性符号（颠倒的圣手榴弹:)，然后再见全部写在一行上。
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它跳到下一页的开头。 （主要适用于输出设备是打印机而不是 VDU 的终端。）
It skips to the start of the next page. (Applies mostly to terminals where the output device is a printer rather than a VDU.)
来自 wiki 页面
或更多详细信息此处。
看来这个符号现在已经相当过时了，它的处理方式可能是（？）依赖于实现的。至少对我来说，您的代码给出以下输出（xcode gcc 4.2，gdb 控制台）：
From wiki page
or more details here.
It seems that this symbol is rather obsolete now and the way it is processed may be(?) implementation dependent. At least for me your code gives the following output (xcode gcc 4.2, gdb console):
如果您正在为1980年代风格的打印机编程，它将弹出纸张并启动新页面。您几乎可以肯定不需要它。
http://en.wikipedia.org/wiki/Form_feed
If you were programming for a 1980s-style printer, it would eject the paper and start a new page. You are virtually certain to never need it.
http://en.wikipedia.org/wiki/Form_feed
它来自fan-fold paper.
Trust me, you ain't gonna need it...
It comes from the era of Line Printers and green-striped fan-fold paper.
Trust me, you ain't gonna need it...
Although recently its use is undefined, a common and useful use for the form feed is to separate sections of code vertically, like so:
(from http://ergoemacs.org/emacs/emacs_form_feed_section_paging.html)
Although recently its use is undefined, a common and useful use for the form feed is to separate sections of code vertically, like so:
(from http://ergoemacs.org/emacs/emacs_form_feed_section_paging.html)
的末端启动第二行
它要转到newline，然后添加空格以在第一行输出
It's go to newline then add spaces to start second line at end of first line
Output