fix(rounding): check if the value is a float

check the value is a float and if it is, convert it to a float
then convert back to a string by rounding off the significant
zeros to the expected amount.

+ref: #55

.gitignore

@@ -8,6 +8,7 @@
 *.out
 c.out
 coverage.html
+.mise.toml
 
 # Test binary, built with `go test -c`
 *.test
@@ -43,4 +44,4 @@ test/test
 .DS_Store
 
 # Editor files
-.idea
+.idea

rounding_test.go

@@ -0,0 +1,46 @@
+package xlsxreader
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func getColCount(f *XlsxFileCloser) int {
+	row := <-f.ReadRows(f.Sheets[0])
+	if row.Error != nil {
+		return 0
+	}
+	return asIndex(row.Cells[len(row.Cells)-1].Column) + 1
+}
+
+func TestFloatingPointRounding(t *testing.T) {
+
+	t.Run("rounding", func(t *testing.T) {
+		xl, err := OpenFile("./test/test-rounding.xlsx")
+		// Create an instance of the reader by opening a target file
+		var target string
+		// Ensure the file reader is closed once utilised
+		defer xl.Close()
+		numColumns := getColCount(xl)
+		for row := range xl.ReadRows(xl.Sheets[0]) {
+			if row.Error != nil {
+				continue
+			}
+			csvRow := make([]string, numColumns)
+			for _, curCell := range row.Cells {
+				colIndex := asIndex(curCell.Column)
+				if curCell.Column == "L" && curCell.Row == 2 {
+					target = curCell.Value
+				}
+				if colIndex < numColumns {
+					csvRow[colIndex] = curCell.Value
+				}
+			}
+
+		}
+
+		require.NoError(t, err)
+		require.Equal(t, "4.4", target)
+	})
+}

rows.go

@@ -232,7 +232,12 @@ func (x *XlsxFile) getCellValue(r rawCell) (string, error) {
 		return formattedDate, nil
 	}
 
-	return *r.Value, nil
+	v, err := strconv.ParseFloat(*r.Value, 64)
+	if err != nil {
+		return *r.Value, nil
+	}
+	new_val := strconv.FormatFloat(v, 'f', -1, 64)
+	return new_val, nil
 }
 
 func (x *XlsxFile) getCellType(r rawCell) CellType {