Question

How to overload the operator -- (unary decrement) in C#

Answer 1

using System;

namespace ConsoleApplication1
{
    class Test
    {
        public int _n = 100;

        public static Test operator + (Test x, Test y)
        {
            Test t = new Test();

            t._n = x._n + y._n;

            return t;
        }
        public static Test operator -- (Test t)
        {
            t._n--;

            return t;
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Test a = new Test();
            a--;
            Console.WriteLine(a._n);

            Test b = new Test();
            b--;
            b--;
            Console.WriteLine(b._n);

            Test t = a + b;
            Console.WriteLine(t._n);
        }
    }
}

/*
run:
 
99
98
197
    
*/

 

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