C# Decimal.Round()用法及代码示例

C# 中的 Decimal.Round() 方法用于将值四舍五入到最接近的整数或指定的小数位数。

用法

以下是语法 -

public static decimal Round (decimal d);
public static decimal Round (decimal d, int decimals);
public static decimal Round (decimal d, MidpointRounding mode);
public static decimal Round (decimal d, int decimals, MidpointRounding mode);

示例

现在让我们看一个实现 Decimal.Round() 方法的例子 -

using System;
public class Demo {
   public static void Main(){
      Decimal val1 = 9.00m;
      Decimal val2 = 15.29m;
      Decimal val3 = 394949845.14245M;
      Console.WriteLine("Decimal 1 = "+val1);
      Console.WriteLine("Decimal 2 = "+val2);
      Console.WriteLine("Decimal 2 = "+val2);
      Console.WriteLine("Remainder = "+(Decimal.Remainder(val1,val2)));
      Console.WriteLine("Value 1 (Rounded) = "+(Decimal.Round(val1)));
      Console.WriteLine("Value 2 (Rounded) = "+(Decimal.Round(val2)));
      Console.WriteLine("Value 3 (Rounded) = "+(Decimal.Round(val3)));
   }
}

输出

这将产生以下输出 -

Decimal 1 = 9.00
Decimal 2 = 15.29
Decimal 2 = 15.29
Remainder = 9.00
Value 1 (Rounded) = 9
Value 2 (Rounded) = 15
Value 3 (Rounded) = 394949845

示例

现在让我们看另一个实现 Decimal.Round() 方法的例子 -

using System;
public class Demo {
   public static void Main(){
      Decimal val1 = 6.59m;
      Decimal val2 = 30.12m;
      Decimal val3 = 6946649845.25245M;
      Console.WriteLine("Decimal 1 = "+val1);
      Console.WriteLine("Decimal 2 = "+val2);
      Console.WriteLine("Decimal 2 = "+val2);
      Console.WriteLine("Remainder = "+(Decimal.Remainder(val1,val2)));
      Console.WriteLine("Value 1 (Rounded) = "+(Decimal.Round(val1,1)));
      Console.WriteLine("Value 2 (Rounded) = "+(Decimal.Round(val2,1)));
      Console.WriteLine("Value 3 (Rounded) = "+(Decimal.Round(val3,2)));
   }
}

输出

这将产生以下输出 -

Decimal 1 = 6.59
Decimal 2 = 30.12
Decimal 2 = 30.12
Remainder = 6.59
Value 1 (Rounded) = 6.6
Value 2 (Rounded) = 30.1
Value 3 (Rounded) = 6946649845.25