c++如何分割字符串示例代碼

2020-05-23 14:01:10

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話不多說(shuō)，直接上代碼

如果需要根據(jù)單一字符分割單詞，直接用getline讀取就好了，很簡(jiǎn)單

 #include <iostream> #include <vector> #include <string> #include <sstream> using namespace std;  int main() {   string words;   vector<string> results;   getline(cin, words);   istringstream ss(words);   while (!ss.eof())   {     string word;     getline(ss, word, ',');     results.push_back(word);   }   for (auto item : results)   {     cout << item << " ";   } }

如果是多種字符分割，比如，。！等等，就需要自己寫(xiě)一個(gè)類似于split的函數(shù)了：

 #include <iostream> #include <vector> #include <string> #include <sstream> using namespace std;  vector<char> is_any_of(string str) {   vector<char> res;   for (auto s : str)     res.push_back(s);   return res; }  void split(vector<string>& result, string str, vector<char> delimiters) {   result.clear();   auto start = 0;   while (start < str.size())   {     //根據(jù)多個(gè)分割符分割     auto itRes = str.find(delimiters[0], start);     for (int i = 1; i < delimiters.size(); ++i)     {       auto it = str.find(delimiters[i],start);       if (it < itRes)         itRes = it;     }     if (itRes == string::npos)     {       result.push_back(str.substr(start, str.size() - start));       break;     }     result.push_back(str.substr(start, itRes - start));     start = itRes;     ++start;   } }  int main() {   string words;   vector<string> result;   getline(cin, words);   split(result, words, is_any_of(", .?!"));   for (auto item : result)   {     cout << item << ' ';   } }

例如：輸入hello world！Welcome to my blog,thank you!

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