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How to Round Down a Number to the Nearest Integer in C#: .NET 10 update #2328

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142 changes: 72 additions & 70 deletions numbers-csharp/RoundDownToNearestInteger/RoundDownToNearestInteger/OutputRoundingResults.cs
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Original file line number Diff line number Diff line change
@@ -1,85 +1,87 @@
namespace RoundDownToNearestInteger
using System.Globalization;

namespace RoundDownToNearestInteger;

internal static class OutputRoundingResults
{
internal static class OutputRoundingResults
private static void WriteResultsToConsole(double[] testCases, int[] results, int[] desiredResults)
{
private static void WriteResultsToConsole(double[] testCases, int[] results, int[] desiredResults)
for (var cnt = 0; cnt < testCases.Length; cnt++)
{
for (var cnt = 0; cnt < testCases.Length; cnt++)
{
Console.WriteLine($"Rounding {testCases[cnt]} results in {results[cnt]} (desired result: {desiredResults[cnt]})");
}

Console.WriteLine();
Console.WriteLine(string.Create(CultureInfo.InvariantCulture,
$"Rounding {testCases[cnt]} results in {results[cnt]} (desired result: {desiredResults[cnt]})"));
}

public static void RoundDownUsingMathFloor(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using Math.Floor():");
var results = RoundingMethods.RoundDownUsingMathFloor(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}
Console.WriteLine();
}

public static void RoundDownUsingMathTruncate(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using Math.Truncate():");
var results = RoundingMethods.RoundDownUsingMathTruncate(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}
public static void RoundDownUsingMathFloor(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using Math.Floor():");
var results = RoundingMethods.RoundDownUsingMathFloor(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}

public static void RoundDownUsingMathRoundWithToEvenMode(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using Math.Round() with ToEven mode:");
var results = RoundingMethods.RoundDownUsingMathRoundWithToEvenMode(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}
public static void RoundDownUsingMathTruncate(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using Math.Truncate():");
var results = RoundingMethods.RoundDownUsingMathTruncate(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}

public static void RoundDownUsingMathRoundWithAwayFromZeroMode(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using Math.Round() with AwayFromZero mode:");
var results = RoundingMethods.RoundDownUsingMathRoundWithAwayFromZeroMode(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}
public static void RoundDownUsingMathRoundWithToEvenMode(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using Math.Round() with ToEven mode:");
var results = RoundingMethods.RoundDownUsingMathRoundWithToEvenMode(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}

public static void RoundDownUsingMathRoundWithToZeroMode(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using Math.Round() with ToZero mode:");
var results = RoundingMethods.RoundDownUsingMathRoundWithToZeroMode(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}
public static void RoundDownUsingMathRoundWithAwayFromZeroMode(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using Math.Round() with AwayFromZero mode:");
var results = RoundingMethods.RoundDownUsingMathRoundWithAwayFromZeroMode(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}

public static void RoundDownUsingMathRoundWithToNegativeInfinityMode(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using Math.Round() with ToNegativeInfinity mode:");
var results = RoundingMethods.RoundDownUsingMathRoundWithToNegativeInfinityMode(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}
public static void RoundDownUsingMathRoundWithToZeroMode(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using Math.Round() with ToZero mode:");
var results = RoundingMethods.RoundDownUsingMathRoundWithToZeroMode(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}

public static void RoundDownUsingMathRoundWithToPositiveInfinityMode(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using Math.Round() with ToPositiveInfinity mode:");
var results = RoundingMethods.RoundDownUsingMathRoundWithToPositiveInfinityMode(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}
public static void RoundDownUsingMathRoundWithToNegativeInfinityMode(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using Math.Round() with ToNegativeInfinity mode:");
var results = RoundingMethods.RoundDownUsingMathRoundWithToNegativeInfinityMode(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}

public static void RoundDownUsingConvertToInt32(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using Convert.ToInt32():");
var results = RoundingMethods.RoundDownUsingConvertToInt32(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}
public static void RoundDownUsingMathRoundWithToPositiveInfinityMode(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using Math.Round() with ToPositiveInfinity mode:");
var results = RoundingMethods.RoundDownUsingMathRoundWithToPositiveInfinityMode(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}

public static void RoundDownUsingCasting(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using casting:");
var results = RoundingMethods.RoundDownUsingCasting(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}
public static void RoundDownUsingConvertToInt32(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using Convert.ToInt32():");
var results = RoundingMethods.RoundDownUsingConvertToInt32(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}

public static void RoundDownUsingSubtractionWithModulo(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using subtraction with modulo:");
var results = RoundingMethods.RoundDownUsingSubtractionWithModulo(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}
public static void RoundDownUsingCasting(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using casting:");
var results = RoundingMethods.RoundDownUsingCasting(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}

public static void RoundDownUsingSubtractionWithModulo(double[] testCases, int[] desiredResults)
{
Console.WriteLine($"Round down using subtraction with modulo:");
var results = RoundingMethods.RoundDownUsingSubtractionWithModulo(testCases);
WriteResultsToConsole(testCases, results, desiredResults);
}
}
}
35 changes: 17 additions & 18 deletions numbers-csharp/RoundDownToNearestInteger/RoundDownToNearestInteger/Program.cs
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Original file line number Diff line number Diff line change
@@ -1,31 +1,30 @@
namespace RoundDownToNearestInteger
namespace RoundDownToNearestInteger;

internal class Program
{
internal class Program
public static void Main(string[] args)
{
public static void Main(string[] args)
{
var testCases = new double[] { 2.5, 1.75, 1.5, 1.25, -1.25, -1.5, -1.75, -2.5 };
var desiredResults = new int[] { 2, 1, 1, 1, -2, -2, -2, -3 };
double[] testCases = [2.5, 1.75, 1.5, 1.25, -1.25, -1.5, -1.75, -2.5];
int[] desiredResults = [2, 1, 1, 1, -2, -2, -2, -3];

OutputRoundingResults.RoundDownUsingMathFloor(testCases, desiredResults);
OutputRoundingResults.RoundDownUsingMathFloor(testCases, desiredResults);

OutputRoundingResults.RoundDownUsingMathTruncate(testCases, desiredResults);
OutputRoundingResults.RoundDownUsingMathTruncate(testCases, desiredResults);

OutputRoundingResults.RoundDownUsingMathRoundWithToEvenMode(testCases, desiredResults);
OutputRoundingResults.RoundDownUsingMathRoundWithToEvenMode(testCases, desiredResults);

OutputRoundingResults.RoundDownUsingMathRoundWithAwayFromZeroMode(testCases, desiredResults);
OutputRoundingResults.RoundDownUsingMathRoundWithAwayFromZeroMode(testCases, desiredResults);

OutputRoundingResults.RoundDownUsingMathRoundWithToZeroMode(testCases, desiredResults);
OutputRoundingResults.RoundDownUsingMathRoundWithToZeroMode(testCases, desiredResults);

OutputRoundingResults.RoundDownUsingMathRoundWithToNegativeInfinityMode(testCases, desiredResults);
OutputRoundingResults.RoundDownUsingMathRoundWithToNegativeInfinityMode(testCases, desiredResults);

OutputRoundingResults.RoundDownUsingMathRoundWithToPositiveInfinityMode(testCases, desiredResults);
OutputRoundingResults.RoundDownUsingMathRoundWithToPositiveInfinityMode(testCases, desiredResults);

OutputRoundingResults.RoundDownUsingConvertToInt32(testCases, desiredResults);
OutputRoundingResults.RoundDownUsingConvertToInt32(testCases, desiredResults);

OutputRoundingResults.RoundDownUsingCasting(testCases, desiredResults);
OutputRoundingResults.RoundDownUsingCasting(testCases, desiredResults);

OutputRoundingResults.RoundDownUsingSubtractionWithModulo(testCases, desiredResults);
}
OutputRoundingResults.RoundDownUsingSubtractionWithModulo(testCases, desiredResults);
}
}
}
2 changes: 1 addition & 1 deletion ...harp/RoundDownToNearestInteger/RoundDownToNearestInteger/RoundDownToNearestInteger.csproj
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@

<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net7.0</TargetFramework>
<TargetFramework>net10.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
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