using System;
using System.Collections.Generic;
using System.Text;

namespace Example5_15 {
    class Program {
        /// <summary>
        /// 求兩個整數的和
        /// </summary>
        /// <param name="x">整數x</param>
        /// <param name="y">整數y</param>
        /// <returns>x+y的和</returns>
        static void Add(int x, int y) {
            Console.WriteLine("非ref方式：");
            Console.WriteLine("{0} + {1}的值為： {2}", x, y, x + y);
            return;
        }

        /// <summary>
        /// 求兩個以ref方式傳入的整數的和
        /// </summary>
        /// <param name="x">整數x</param>
        /// <param name="y">整數y</param>
        /// <returns>x+y的和</returns>
        static void Add(ref int x, ref int y) {
            Console.WriteLine("ref方式：");
            Console.WriteLine("{0} + {1}的值為： {2}", x, y, x + y);
            return;
        }

        static void Main(string[] args) {
            int a = 5;
            int b = 3;
            Add(a, b);
            Add(ref a, ref b);
            Console.ReadLine();
        }
    }
}