stl string 使用(转载)

出处:http://www.cnblogs.com/lzjsky/archive/2011/01/23/1942508.html

1. 查找字符

 std::wstring  strData = L"<result>[北京市, 上海市, 深圳市]</result>"

 void DoF(const std::wstring &strData, std::list<std::wstring>& listDo)

 {

     std::wstring strTarB = L"<result>[";

     std::wstring strTarE = L"]</result>";

     std::wstring::size_type nBeginTempB = , nEndTempB = , nBeginTempE = , nEndTempE = ;

     nEndTempB = strData.find(strTarB, nBeginTempB);

     nEndTempE = strData.find(strTarE, nBeginTempE);

     if(nEndTempB != std::wstring::npos && nEndTempE != std::wstring::npos && nEndTempE > nEndTempB + strTarB.length())

     {

         std::wstring strTemp = strData.substr(nEndTempB + strTarB.length(), nEndTempE -  nEndTempB - strTarB.length());

         std::wstring strSub;

         strTemp += L",";

         std::list<std::wstring>::iterator it;

         listDo.clear();

         std::wstring::size_type nBegin = , nEnd = ;

         while( (nEnd = strTemp.find(L",", nBegin)) != std::wstring::npos)

         {

             strSub = strTemp.substr(nBegin, nEnd - nBegin);

             if(strSub.length() > )

             {

                 listDo.push_back(strSub);

             }

             nBegin = nEnd + ;

         }

     }

 }

2. 替换字符串

stl 中的string只是提供了按照位置和区间的replace函数，而不能用一个string字串来替换指定string中的另一个字串.

 void string_replace(std::string& strBig, const std::string & strsrc, const std::string &strdst)

 {

      std::string::size_type pos = ;

      while( (pos = strBig.find(strsrc, pos)) != string::npos)

      {

          strBig.replace(pos, strsrc.length(), strdst);

          pos += strdst.length();

      }

 }

 // 使用

 std::string strinfo= "This is Winter, Winter is a programmer. Do you know Winter?";

 // 把strinfo中的所有"Winter" 替换为"wende"

 string_replace(strinfo, "Winter", "wende");