c++ 查找和替換整個單詞 (c++ Find and replace whole word)

問題描述

c++ 查找和替換整個單詞 (c++ Find and replace whole word)

我如何查找和替換（匹配整個單詞）。我有這個。

  void ReplaceString(std::string &subject, const std::string& search, const std::string& replace)
   {
    size_t pos = 0;
    while ((pos = subject.find(search, pos)) != std::string::npos) {
        subject.replace(pos, search.length(), replace);
        pos += replace.length();
    }
}

但它不會搜索整個單詞。例如，如果我嘗試

string test = "i like cake";
ReplaceString(test, "cak", "notcake");

它仍然會替換，但我希望它匹配整個單詞。

參考解法

方法 1:

You're just blindly replacing any instances of search with replace without checking if they're full words prior to performing the replacement.

Here are just a couple of things you can try to work around that:

• Split the string into individual words, then check each word against search, and replace if necessary. Then rebuild the string.
• Replace only if pos‑1 and pos + search.length() + 1 are both spaces.

(by Real Zibux、lcs)

參考文件

1. c++ Find and replace whole word (CC BY‑SA 2.5/3.0/4.0)