[C# 프로그래밍] 11장 람다식

람다식 예제

using System;
using System.Linq;
 
namespace EX10_LamdaExpression
{
    delegate int Operator(int a, int b);
    delegate void OperatorCB(int a, int b);
 
    class MainClass
    {
        public static Operator calculate;
        public static OperatorCB calculateCB;
 
        public static void Main (string[] args)
        {
            // Lamda Expression
            calculate = (int a, int b) => a + b;
            Console.WriteLine ("{0} + {1} = {2}", 83, 34, calculate (83, 34));
 
            calculate = (int a, int b) => a - b;
            Console.WriteLine ("{0} + {1} = {2}", 83, 34, calculate (83, 34));
 
            calculate = (int a, int b) => a * b;
            Console.WriteLine ("{0} + {1} = {2}", 83, 34, calculate (83, 34));
 
            calculate = (int a, int b) => a / b;
            Console.WriteLine ("{0} + {1} = {2}", 83, 34, calculate (83, 34));
 
            // Lamda Expression Statement
            calculateCB = (int a, int b) => {
                int result = a % b;
                Console.WriteLine ("{0} % {1} = {2}", a, b, result);
            };
            calculateCB(83, 34);
 
            // Lamda Expression in LINQ
            int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0, 13, 15 };
            int oddNumberCount = numbers.Where (n => n % 2 != 0).Count();
            Console.WriteLine (oddNumberCount);
        }
    }
}