std::string test;
test.resize(512+1);
cin.getline(reinterpret_cast<char*>(test.c_str()), test.size()-1);

char test[512 + 1] = {0};
string test2;
cin.getline(test,sizeof(test)-1);
test2 = test;

char test[512 + 1] = {0};
string test2;
cin.getline(test,sizeof(test)-1);
test2 = test;

char szTest[512+1] = {0};
cin.getline(szTest, sizeof(szTest)-1);

std::string strTest = std::string(szTest);

template<class T>
std::string getline(T & in)
{
   std::string retval = "";
   bool run = true;
   
   while(run)
   {
       char buffer[2048+1] = {0};
   
       in.get(buffer, sizeof(buffer)-1, '\n');
       if(in.eof()) break;

       size_t len = strlen(buffer);
       if(len == 0) break;
       if(buffer[len-1] == '\n')
       {
          buffer[len-1] = 0;
          run = false;
       }

       retval += buffer;
   }

   return retval;
}

std::string test = getline<std::istream>(cin);