Fix #142 & update single header csv.hpp

Author: vincentlaucsb

include/internal/csv_writer.hpp

@@ -61,7 +61,7 @@ namespace csv {
             size_t decimal = (size_t)(((double)std::abs(value) - (double)integral) * 100000);
 
             result += ".";
-            result += (decimal == 0) ? "0" : to_string(integral);
+            result += (decimal == 0) ? "0" : to_string(decimal);
 
             return result;
         }

single_include/csv.hpp

@@ -6556,7 +6556,7 @@ namespace csv {
             size_t decimal = (size_t)(((double)std::abs(value) - (double)integral) * 100000);
 
             result += ".";
-            result += (decimal == 0) ? "0" : to_string(integral);
+            result += (decimal == 0) ? "0" : to_string(decimal);
 
             return result;
         }
@@ -7307,7 +7307,7 @@ namespace csv {
      *  \snippet tests/test_read_csv.cpp CSVField Example
      *
      */
-    CSV_INLINE CSVReader::CSVReader(csv::string_view filename, CSVFormat format) {
+	CSV_INLINE CSVReader::CSVReader(csv::string_view filename, CSVFormat format) : _format(format) {
         auto head = internals::get_csv_head(filename);
         using Parser = internals::MmapParser;
 

single_include_test/csv.hpp

@@ -6556,7 +6556,7 @@ namespace csv {
             size_t decimal = (size_t)(((double)std::abs(value) - (double)integral) * 100000);
 
             result += ".";
-            result += (decimal == 0) ? "0" : to_string(integral);
+            result += (decimal == 0) ? "0" : to_string(decimal);
 
             return result;
         }
@@ -7307,7 +7307,7 @@ namespace csv {
      *  \snippet tests/test_read_csv.cpp CSVField Example
      *
      */
-    CSV_INLINE CSVReader::CSVReader(csv::string_view filename, CSVFormat format) {
+	CSV_INLINE CSVReader::CSVReader(csv::string_view filename, CSVFormat format) : _format(format) {
         auto head = internals::get_csv_head(filename);
         using Parser = internals::MmapParser;
 

tests/test_write_csv.cpp

@@ -98,13 +98,13 @@ TEST_CASE("CSV Tuple", "[test_csv_tuple]") {
     csv_writer << std::make_tuple("One", 2, "Three", 4.0, time)
         << std::make_tuple("One", (short)2, "Three", 4.0f, time)
         << std::make_tuple(-1, -2.0)
-        << std::make_tuple(20.2, -20.2)
+        << std::make_tuple(20.2, -20.3)
         << std::make_tuple(0.0, 0.0f, 0);
 
     correct_output << "One,2,Three,4.0,5:30" << std::endl
         << "One,2,Three,4.0,5:30" << std::endl
         << "-1,-2.0" << std::endl
-        << "20.20,-20.20" << std::endl
+        << "20.19999,-20.30000" << std::endl
         << "0.0,0.0,0" << std::endl;
 
     REQUIRE(output.str() == correct_output.str());