日々の破片

_ C#の引数と返値

public class Fun
{
    delegate int x();
    static x cx(int n)
    {
        int i = n * 10;
        return () => { return ++i; };
    }
    static x dx(x xx)
    {
        return () => { return xx(); };
    }
    public static void Main()
    {
        var fun1 = cx(10);
        System.Console.WriteLine(fun1());
        var fun2 = cx(20);
        System.Console.WriteLine(fun2());
        System.Console.WriteLine(fun1());
        System.Console.WriteLine(fun2());
        var fun3 = dx(fun2);
        System.Console.WriteLine(fun3());                
        System.Console.WriteLine(fun2());
        System.Console.WriteLine(fun3());                
    }
}

C:\test>fun
101
201
102
202
203
204
205