text: // test075.cpp - generate new document by column labels
  
  #include <rntcsv.h>
  #include "unittest.h"
  
  int main()
  {
    int rv = 0;
  
    std::string csvref =
      ",A,B,C,D\n"
      "0,2,4,16,256\n"
      "1,3,9,81,6561\n"
      "2,4,16,256,65536\n"
      "3,5,25,625,390625\n"
    ;
  
    std::string path = unittest::TempPath();
  
    try
    {
      rntcsv::document doc("", rntcsv::label_parameters(0, 0), rntcsv::separator_parameters(',', false, false));
  
        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.assign_column<int>(0, std::vector<int>({2, 3}));
        doc.assign_column<int>(1, std::vector<int>({4, 9, 16, 25}));
        doc.assign_column<int>(2, std::vector<int>({16, 81, 256, 625}));
        doc.assign_column<int>(3, std::vector<int>({256, 6561, 65536, 390625}));
  
        doc.set_cell<int>(0, 2, 4);
        doc.set_cell<int>(0, 3, 5);
  
        doc.row_name(0, "0");
        doc.row_name(1, "1");
        doc.row_name(2, "2");
        doc.row_name(3, "3");
  
        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;
  }
  