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C# 方法重载


方法重载

使用方法重载,多个方法可以拥有相同的名字,但参数不同。

示例

int MyMethod(int x)
float MyMethod(float x)
double MyMethod(double x, double y)

考虑以下示例,它有两个方法可以对不同类型的数字进行加法运算。

示例

static int PlusMethodInt(int x, int y)
{
  return x + y;
}

static double PlusMethodDouble(double x, double y)
{
  return x + y;
}

static void Main(string[] args)
{
  int myNum1 = PlusMethodInt(8, 5);
  double myNum2 = PlusMethodDouble(4.3, 6.26);
  Console.WriteLine("Int: " + myNum1);
  Console.WriteLine("Double: " + myNum2);
}

自己尝试一下 »

与其定义两个应该执行相同操作的方法,不如重载一个方法。

在下面的示例中,我们重载了 PlusMethod 方法,使其适用于 intdouble 两种类型。

示例

static int PlusMethod(int x, int y)
{
  return x + y;
}

static double PlusMethod(double x, double y)
{
  return x + y;
}

static void Main(string[] args)
{
  int myNum1 = PlusMethod(8, 5);
  double myNum2 = PlusMethod(4.3, 6.26);
  Console.WriteLine("Int: " + myNum1);
  Console.WriteLine("Double: " + myNum2);
}

自己尝试一下 »

注意:只要参数的数量和/或类型不同,多个方法就可以拥有相同的名字。


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