C#之引用 ref

清疚 2022-06-17 08:50 132阅读 0赞

目前没有深究，和c++用法一样，在代码编写过程中发现，在主函数之外写函数需要声明成为static类型的，否则编译不通过，真是蛋疼

using System;
    using System.Text;
    
    namespace Excise1
    {
        public class Program
        {
            public class Student
            {
                private int age;
                private string name;
                private string id;
    
                public int Age
                {
                    get
                    {
                        return age;
                    }
    
                    set
                    {
                        age = value;
                    }
                }
    
                public string Name
                {
                    get
                    {
                        return name;
                    }
    
                    set
                    {
                        name = value;
                    }
                }
    
                public string ID
                {
                    get
                    {
                        return id;
                    }
    
                    set
                    {
                        id = value;
                    }
                }
            }
          
                static void swap(ref int a, ref int b)
                {
                    int temp;
                    temp = a;
                    a = b;
                    b = temp;
                }
            
         
            public static void Main(string[] args)
            {
                Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
                int a = 5;
                int b = 10;
           
                swap(ref a,ref b);
                Console.WriteLine(" a=" + a + " b=" + b);
                             
                Console.ReadKey(); 
            }
        }
    }