##实战c++中的string系列--std:vector<char> 和std:string相互转换(vector to stringstream) 有时候也会遇到std:vector与转std:string 相互转换的情况。 首先看一下`vector<char>`如何转string： ~~~ std::vector<char> *data = response->getResponseData(); std::string res; //方法一 for (int i = 0;i<data->size();++i) { res+=(*data)[i]; } res+='\0'; std:cout << res; //方法二 std::vector<char> *data = response->getResponseData(); std::string res; res.insert(res.begin(), data->begin(), data->end()); std::cout << res; //方法三 std::vector<char> *data = response->getResponseData(); std::string res; const char* s = &(*data->begin()); res = std::string(s, data->size()); std::cout << res; //方法四 string ch = "what a fucking day!"; vector <char> ta; ta.resize(ch.size()); ta.assign(ch.begin(),ch.end()); ~~~ string 转vector就会更容易： ~~~ vector <char> ta = {‘a’, 'b', 'c'}; ch.clear(); ch.assign(ta.begin(),ta.end()); ~~~ ================================================================  **vector to stringstream** ~~~ #include <iostream> #include <sstream> #include <vector> #include <string> #include <iterator> // Dummy std::vector of strings std::vector<std::string> sentence; sentence.push_back("aa"); sentence.push_back("ab"); // Required std::stringstream object std::stringstream ss; // Populate std::copy(sentence.begin(), sentence.end(),std::ostream_iterator<std::string>(ss,"\n")); // Display std::cout<<ss.str()<<std::endl; ~~~