C#引用参数代码运行示例

关于引用参数

本文主要贴上一段关于C#中引用参数的调试代码，示例主要内容是计算BMI指数；

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Data;//此处声明用于数学类方法调用///涉及的主要知识点在于引用参数、///C#数据的输入读取、类型转换和小数点精确namespace Chapter5_Reference{    class myClass    {        public int weight;        public double height;        public double BMI;                public double myFun()//定义一个方法，功能主要是读取身高和体重等参数，再者计算BMI并返回        {            Console.WriteLine("The BMI is defined as the body mass divided by the square of the body height,");            Console.WriteLine("Please input your height(cm):");            height = Convert.ToDouble(Console.ReadLine());//读取身高单位cm            Console.WriteLine("Please input your weight(kg):");            weight = Convert.ToInt32(Console.ReadLine());//读取体重单位kg            BMI = weight / (height * height);//计算BMI            //Console.WriteLine("so your BMI value is :"+BMI);            return BMI;        }            }    class Program    {        static void myMethod(ref myClass mc, ref int age)        {            mc.BMI *= 10000;//BMI数据还原            mc.BMI=Math.Round(mc.BMI, 3);//将BMI指数精确到小数点后三位            //结果输出            Console.WriteLine("The Result as follow:");            if (mc.BMI < 18.5)               Console.WriteLine("BMI : "+mc.BMI+" , which is less than 18.5, maybe you are underweight.");            else if(mc.BMI>=18.5&&mc.BMI<=25)               Console.WriteLine("BMI : " + mc.BMI + " , which is normal, Congratulation!");            else               Console.WriteLine("BMI : "+ mc.BMI + " , which is greater than 25, maybe you are overweight.");            age += 1;               Console.WriteLine("AGE : {0}",age);        }        static void Main(string[] args)        {            myClass MM = new myClass();//入口            MM.myFun();//类中方法调用            Console.WriteLine("Please input your age: ");            int Age = Convert.ToInt32(Console.ReadLine());            myMethod(ref MM, ref Age);//方法调用，引用参数；调用结束之后原形参mc和age失效            Console.ReadKey();        }    }}

运行结果：