从字符串中的单词序列替换整个单词

问题描述

大家好，这是我的第一个问题，所以请注意我这是否有问题。

我想在不使用的情况下更换一些单词提升库或其他.hpp'。

我的第一次尝试是制作字符串的副本，效率很低。我并不为此感到骄傲，所以我将在我使用地址的第二次尝试中发布。

Hello, everybody, this is my first question, so please notice me if it''s something wrong with this.
I want to replace some words without using boost libraries or other .hpp''s.
My first attempt was to make a copy of the string, and it was quite inefficient. I''m not very proud of it, so I will post my second attempt where I use addresses.

void ReplaceString(std::string &subject, const std::string &search, const std::string &replace)
{
    size_t position = 0;
    while ((position = subject.find(search, position)) != std::string::npos)	//if something f***s up --> failure
    {
         subject.replace(position, search.length(), replace);
         position = position + replace.length();
    }
}

因为效率不高我想用另一种东西，但是我被困;我想使用一个函数，如

Because It''s not very efficient I want to use another thing, but I got stuck; I want to use a function like

replace_stuff(std::string & a);

，使用string.replace（）和string.find（）一个参数（用for循环或其他东西解析它然后使用std :: map< std :: string，>这对我来说非常方便。



有谁可以帮我这个，拜托？几个月前我开始学习C ++，我不知道很多技巧和窍门。我的连贯性也有一些问题，请原谅我可怜的英语。

祝你好运，

乔治。



PS我想用它来输入大量的输入词。 （让我们说用无害的单词替换坏词）

with a single parameter using string.replace() and string.find() (parsing it with a for loop or something) and then make use of std::map <std::string,> which is very convenient for me.

Can anyone help me with this, please? I started learning C++ few months ago, and I don''t know many tips and tricks. I also have some problems with my coherence, so please excuse my poor English.
Best regards,
George.

P.S. I want to use it for a large number of input words. (let''s say replacing bad words with harmless ones)

推荐答案

class Replacer
{
  std::map<std::string,> replacement;

public:
  Replacer()
  {
     // init the map here
     replacement.insert ( std::pair<std::string,std::string>("C#","C++") );
     //...
  }
  void replace_stuff(std::string & a);
}

那么 replace_stuff 定义将非常类似于您的原始 ReplaceString （它将使用地图条目而不是传递的参数）。

Then the replace_stuff definition would be very similar to your original ReplaceString (it would use map entries instead of the passed parameters).

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