Math.Round C#（對於開發者的運行原理）

// Methods overloaded by Math.Round
Math.Round(Double)
Math.Round(Double, Int32) // Int32 specifies number of fractional digits
Math.Round(Double, Int32, MidpointRounding)  // Int32 specifies number of fractional digits, MidpointRounding is the type of rounding method
Math.Round(Double, MidpointRounding)  // MidpointRounding is the type of rounding method
Math.Round(Decimal)
Math.Round(Decimal, Int32) // Int32 specifies number of fractional digits
Math.Round(Decimal, Int32, MidpointRounding)
Math.Round(Decimal, MidpointRounding)

' Methods overloaded by Math.Round
'INSTANT VB TODO TASK: The following line uses invalid syntax:
'Math.Round(Double) Math.Round(Double, Int32) Math.Round(Double, Int32, MidpointRounding) Math.Round(Double, MidpointRounding) Math.Round(Decimal) Math.Round(Decimal, Int32) Math.Round(Decimal, Int32, MidpointRounding) Math.Round(Decimal, MidpointRounding)

double originalValue = 3.75;
double roundedValue = Math.Round(originalValue); 
// Output: 4

Dim originalValue As Double = 3.75
Dim roundedValue As Double = Math.Round(originalValue)
' Output: 4

decimal originalValue = 8.625m;
decimal roundedValue = Math.Round(originalValue, 2);
// Output: 8.63

Dim originalValue As Decimal = 8.625D
Dim roundedValue As Decimal = Math.Round(originalValue, 2)
' Output: 8.63

double originalValue = 5.5;
double roundedValueEven = Math.Round(originalValue, MidpointRounding.ToEven);
double roundedValueOdd = Math.Round(originalValue, MidpointRounding.AwayFromZero);
// Output: roundedValueEven = 6, roundedValueOdd = 6

Dim originalValue As Double = 5.5
Dim roundedValueEven As Double = Math.Round(originalValue, MidpointRounding.ToEven)
Dim roundedValueOdd As Double = Math.Round(originalValue, MidpointRounding.AwayFromZero)
' Output: roundedValueEven = 6, roundedValueOdd = 6

decimal originalValue = 9.123456m;
decimal roundedValue = Math.Round(originalValue, 3); 
// Output: 9.123

Dim originalValue As Decimal = 9.123456D
Dim roundedValue As Decimal = Math.Round(originalValue, 3)
' Output: 9.123

double originalValue = 123.456789;
double result = Math.Round(originalValue, 4);
// Output: 123.4568, rounded value

Dim originalValue As Double = 123.456789
Dim result As Double = Math.Round(originalValue, 4)
' Output: 123.4568, rounded value

double originalValue = 7.5;
double roundedValue = Math.Round(originalValue, MidpointRounding.AwayFromZero);
// Output: 8

Dim originalValue As Double = 7.5
Dim roundedValue As Double = Math.Round(originalValue, MidpointRounding.AwayFromZero)
' Output: 8

double interestRate = 0.04567;
double roundedInterest = Math.Round(interestRate, 4); // Round to 4 decimal places

Dim interestRate As Double = 0.04567
Dim roundedInterest As Double = Math.Round(interestRate, 4) ' Round to 4 decimal places

double temperature = 23.678;
double roundedTemperature = Math.Round(temperature, 1); // Round to 1 decimal place

Dim temperature As Double = 23.678
Dim roundedTemperature As Double = Math.Round(temperature, 1) ' Round to 1 decimal place

double meanValue = CalculateMean(data);
double roundedMean = Math.Round(meanValue, 2); // Round mean value to 2 decimal places

Dim meanValue As Double = CalculateMean(data)
Dim roundedMean As Double = Math.Round(meanValue, 2) ' Round mean value to 2 decimal places

double experimentalResult = 9.87654321;
double roundedResult = Math.Round(experimentalResult, 5); // Round to 5 decimal places

Dim experimentalResult As Double = 9.87654321
Dim roundedResult As Double = Math.Round(experimentalResult, 5) ' Round to 5 decimal places

double modelResult = SimulatePhysicalSystem(parameters);
double roundedModelResult = Math.Round(modelResult, 3); // Round to 3 decimal places

Dim modelResult As Double = SimulatePhysicalSystem(parameters)
Dim roundedModelResult As Double = Math.Round(modelResult, 3) ' Round to 3 decimal places

double playerPosition = CalculatePlayerPosition();
double roundedPosition = Math.Round(playerPosition, 2); // Round to 2 decimal places

Dim playerPosition As Double = CalculatePlayerPosition()
Dim roundedPosition As Double = Math.Round(playerPosition, 2) ' Round to 2 decimal places

using IronPdf;

List<string> cart = new List<string>();

void AddItems(params string[] items)
{
    for (int i = 0; i < items.Length; i++)
    {
        cart.Add(items[i]);
    }
}

Console.WriteLine("Enter the cart items as comma-separated values:");
var itemsString = Console.ReadLine();
if (itemsString != null)
{
    var items = itemsString.Split(",").ToArray();
    AddItems(items);
}

AddItems("Sample1", "Sample2");

Console.WriteLine("-------------------------------------------------------");
Console.WriteLine("Display Cart");

string name = "Sam";
var count = cart.Count;
string content = $@"
<!DOCTYPE html>
<html>
<body>
<h1>Hello, {name}!</h1>
<p>You have {count} items in the cart.</p>
" + string.Join("\n", cart.Select(x => $"<p>{x}</p>"))
+ @"
</body>
</html>";

var pdfRenderer = new ChromePdfRenderer();
pdfRenderer.RenderHtmlAsPdf(content).SaveAs("cart.pdf");

Imports Microsoft.VisualBasic
Imports IronPdf

Private cart As New List(Of String)()

Private Sub AddItems(ParamArray ByVal items() As String)
	For i As Integer = 0 To items.Length - 1
		cart.Add(items(i))
	Next i
End Sub

Console.WriteLine("Enter the cart items as comma-separated values:")
Dim itemsString = Console.ReadLine()
If itemsString IsNot Nothing Then
	Dim items = itemsString.Split(",").ToArray()
	AddItems(items)
End If

AddItems("Sample1", "Sample2")

Console.WriteLine("-------------------------------------------------------")
Console.WriteLine("Display Cart")

Dim name As String = "Sam"
Dim count = cart.Count
Dim content As String = $"
<!DOCTYPE html>
<html>
<body>
<h1>Hello, {name}!</h1>
<p>You have {count} items in the cart.</p>
" & String.Join(vbLf, cart.Select(Function(x) $"<p>{x}</p>")) & "
</body>
</html>"

Dim pdfRenderer = New ChromePdfRenderer()
pdfRenderer.RenderHtmlAsPdf(content).SaveAs("cart.pdf")