在终端中修改文本 [英] Modifying text in the terminal

问题描述

是否可以在不清除屏幕的情况下修改打印到终端的文本?

Is it possible to modify text I printed to the terminal without clearing the screen?

例如，如果我以百分比显示进度，是否可以在不清除屏幕并再次打印的情况下修改该百分比?我正在寻找一种跨平台的方式，如果有的话.

For instance, if I'm showing progress of something in percentage, can I modify that percentage without having to clear the screen and printing again? I'm looking for a cross-platform way, if there is one.

谈论C ++.

谢谢

推荐答案

有多种方法可以执行此操作，并且根据要投入多少精力，您可以使用ascii做很多很酷的事情终端窗口中显示文本.

There are a number of ways to do this, and depending on how much effort you want to put into it, you can do a lot of cool things with ascii text in a terminal window.

1. 高级: ncurses库

更容易:使用printf或cout

Easier: ansi escape characters with printf or cout

最简单:正如其他人所说，只需使用\r即可在不换行的情况下返回回车.

Easiest: As others have said, simply use \r for a carriage return without a linefeed.

使用ESC序列返回两个字符的示例:

example of using the ESC sequence to go back two characters:

#include <iostream>
#define ESC char(0x1B)

int main(){
  std::cout << "This will overwrite 'rs' in the following: characters" << ESC << "[2D" << "xx" << std::endl;
  return 0;
}

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