如何在控制台应用程序（Linux）中删除打印字符？ [英] How do I erase printed characters in a console application(Linux)?

问题描述

我正在创建一个需要进度条的小控制台应用程序。像... ...

 转换：175/348 Seconds | ========== |我的问题是，如何删除已经打印到控制台上的字符？如何删除已打印到控制台上的字符？当我达到第51百分比，我必须从控制台中删除这一行，并插入一个新行。在我目前的解决方案中，这是发生了什么... 
 转换：175/348 Seconds | ======= === | 50％
转换：179/348秒| ========== | 52％
转换：183/348秒| ========== | 54％
转换：187/348秒| =========== | 56％
  
我使用的代码是... 
  print转换：$ converted_seconds / $ total_time秒$ progress_bar $ converted_percentage％\\\
; 
  
我在Linux中使用PHP进行此操作（只有我会使用应用程序 - 选择）。所以，解决方案应该在Linux平台上工作 - 但是如果你有一个跨平台的解决方案，这将是更可取的。
解决方案
我不认为你需要为语言选择道歉。 
 <$ c $ 
 c><？php 
 for（$ i = 0; $ i <10; $ i ++）{
 print$ i \r; 
 sleep（1）; 
} 
？> 
  
\r将使用新文本覆盖行。要做一个新行，你可以使用\\\
，但我猜你已经知道。 
 
 
 
希望这有助于！我知道这在Linux中工作，但我不知道它是否在Windows或其他操作系统中工作。
 
I am creating a small console app that needs a progress bar. Something like...
Conversion: 175/348 Seconds   |==========          |  50%
My question is, how do you erase characters already printed to the console? When I reach the 51st percentage, I have to erase this line from the console and insert a new line. In my current solution, this is what happens...
Conversion: 175/348 Seconds   |==========          |  50%
Conversion: 179/348 Seconds   |==========          |  52%
Conversion: 183/348 Seconds   |==========          |  54%
Conversion: 187/348 Seconds   |===========         |  56%
Code I use is...
print "Conversion: $converted_seconds/$total_time Seconds   $progress_bar  $converted_percentage%\n";
I am doing this in Linux using PHP(only I will use the app - so please excuse the language choice). So, the solution should work on the Linux platform - but if you have a solution that's cross platform, that would be preferable.
解决方案
I don't think you need to apologize for the language choice. PHP is a great language for console applications.

Try this out:
<?php
for( $i=0;$i<10;$i++){
  print "$i \r";
  sleep(1);
}
?>
The "\r" will over-right the line with the new text. To make a new line you can just use "\n", but I'm guessing you already knew that. 

Hope this helps! I know this works in Linux, but I don't know if it works in Windows or other operating systems.

                        
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