打印字符串，不含转义字符 [英] Print string without escaping characters

问题描述

此代码：

  void Controller :: write（const std :: string& str）{
 std :: cout<< 写作：[< str<< ] 登上。 << std :: endl; 
 s.write（str）; 
  

需要一个字符串串行链接到微控制器。 （这工作正常）。但是，当我尝试推这样： write（ats203？\r），控制台输出如下：

 ] to board.ts203？ 
  

因此写作：[a std :: cout 后遇到 \r 在字符串中。

当遇到转义字符时，如何将字符串打印成一堆字符而不是控制台输出？

编辑：澄清。

我希望我的字符串 ats203？\r 。这是因为使用略微修改的 AT命令控制微控制器，并且不接受该命令，直到它读取 \r 。当字符串被推送到微控制器时，它读取 \r 作为回车，并对 \ r 。

我想要的是显示我已经构造的字符串。根据运行时设置的标志，在其他地方有一些其他命令被创建。所以我最终看起来像 ate1 \ratv0\rat + OSA = 7 \rat + OSX = 255 \r 的字符串。

我想看看我的构造和我正在推动什么。我不能这样做，因为 std :: cout 读取回车，作用于它，并且纠正我的控制台输出。

编辑：再次澄清：
我想要 std :: cout< 写作：[< str<< ] 登上。 << std :: endl; 生成（当 str 是 ats203？\r ） ：

 写作：[ats203？\r] 
  
 
 
解决方案
 
  :: write（const std :: string& command_string）{
 
 std :: string display_string = std :: regex_replace（command_string，std :: regex（（\r）） \\\r）; 
 
 std :: cout<< 写作：[< display_string<< ] to board.\\\
; 
 s.write（command_string）; 
  
那么 write（ats203？\r）将逐字打印出
  ats203？\r 
  pre> 
This code:
void Controller::write(const std::string& str) {
    std::cout << "Writing: [" << str << "] to board." << std::endl; 
    s.write(str);
takes a string and pushes it over a serial link to a microcontroller. (This works fine). However, when I try to push a like this: write("ats203?\r"), the console output looks like this: 
] to board.ts203?
So the Writing: [a gets overwritten by the ] to board. after std::cout encounters the \r in the string. 

How can I print the string as a bunch of characters rather than mangling console output when an escape character is encountered?  

EDIT: To clarify. 

I want my string to be ats203?\r. This is because the microcontroller is controlled using a slightly modified version of an AT command, and doesn't accept the command until it reads a \r. When the string is pushed to the microcontroller, it reads the \r as a carriage return, and acts on things it read prior to the \r. 

What I want is to display the string that I've constructed. There is a bunch of other commands elsewhere that get created depending on flags that are set at runtime. So I end up with strings that look something like ate1\ratv0\rat+OSA=7\rat+OSX=255\r. 

I would like to see what I've constructed and what I'm pushing. I can't do this, because std::cout reads the carriage return, acts on it, and mangles my console output. 

EDIT: Clarification, again: 
I want std::cout << "Writing: [" << str << "] to board." << std::endl; to produce (when str is ats203?\r):
Writing: [ats203?\r] to board. 

解决方案
void Controller::write(const std::string& command_string) {

    std::string display_string = std::regex_replace(command_string,std::regex("(\r)"),"\\r");

    std::cout << "Writing: [" << display_string << "] to board.\n"; 
    s.write(command_string);
So then write("ats203?\r") will literally print out
ats203?\r


                        
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