HOW TO：使用運算子多載建立複數類別 (C# 程式設計手冊)
本範例介紹如何使用運算子多載化來建立一個定義複數加法的複數類別 Complex。 這個程式會顯示數值的虛數和實數部分，以及使用 ToString 方法之覆寫的加法運算結果。
範例
public struct Complex
{
public int real;
public int imaginary;
// Constructor.
public Complex(int real, int imaginary)
{
this.real = real;
this.imaginary = imaginary;
}
// Specify which operator to overload (+),
// the types that can be added (two Complex objects),
// and the return type (Complex).
public static Complex operator +(Complex c1, Complex c2)
{
return new Complex(c1.real + c2.real, c1.imaginary + c2.imaginary);
}
// Override the ToString() method to display a complex number
// in the traditional format:
public override string ToString()
{
return (System.String.Format("{0} + {1}i", real, imaginary));
}
}
class TestComplex
{
static void Main()
{
Complex num1 = new Complex(2, 3);
Complex num2 = new Complex(3, 4);
// Add two Complex objects by using the overloaded + operator.
Complex sum = num1 + num2;
// Print the numbers and the sum by using the overridden
// ToString method.
System.Console.WriteLine("First complex number: {0}", num1);
System.Console.WriteLine("Second complex number: {0}", num2);
System.Console.WriteLine("The sum of the two numbers: {0}", sum);
// Keep the console window open in debug mode.
System.Console.WriteLine("Press any key to exit.");
System.Console.ReadKey();
}
}
/* Output:
First complex number: 2 + 3i
Second complex number: 3 + 4i
The sum of the two numbers: 5 + 7i
*/