text: // test020.cpp - generate new document by row, no row labels
  
  #include <rntcsv.h>
  #include "unittest.h"
  
  int main()
  {
    int rv = 0;
  
    std::string csvref =
      "A,B,C,D\n"
      "2,4,16,256\n"
      "3,9,81,6561\n"
      "4,16,256,65536\n"
      "5,25,625,390625\n"
    ;
  
    std::string path = unittest::TempPath();
  
    try
    {
      rntcsv::document doc("", rntcsv::label_parameters(), rntcsv::separator_parameters(',', false, false));
  
        doc.assign_row<int>(0, std::vector<int>({2, 4}));
        doc.assign_row<int>(1, std::vector<int>({3, 9, 81, 6561}));
        doc.assign_row<int>(2, std::vector<int>({4, 16, 256, 65536}));
        doc.assign_row<int>(3, std::vector<int>({5, 25, 625, 390625}));
  
        doc.set_cell<int>(2, 0, 16);
        doc.set_cell<int>(3, 0, 256);
  
        doc.set_column_name(0, "A");
        doc.set_column_name(1, "B");
        doc.set_column_name(2, "C");
        doc.set_column_name(3, "D");
  
        doc.write(path);
  
      std::string csvread = unittest::ReadFile(path);
  
      unittest::ExpectEqual(std::string, csvref, csvread);
    }
    catch (const std::exception& ex)
    {
      std::cout << ex.what() << std::endl;
      rv = 1;
    }
  
    unittest::DeleteFile(path);
  
    return rv;
  }
  