Comment : utiliser la surcharge d'opérateur pour créer une classe de nombres complexes (Guide de programmation C#)
Cet exemple montre comment utiliser la surcharge d'opérateur pour créer une classe de nombres complexes Complex qui définit une addition complexe. Le programme affiche les parties imaginaires et réelles des nombres et le résultat de l'addition en utilisant une substitution de la méthode ToString.
Exemple
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
*/