C#数据类型的认识

Posted 2020-07-19

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 /// <summary>
 6 /// 命名空间 ，用namespace声明
 7 /// </summary>
 8 namespace ConsoleApplication1
 9 {
10     /// <summary>
11     /// 类，用class声明 
12     /// </summary>
13     class Program
14     {
15         /// <summary>
16         /// 方法，Main方法是应用的入口点方法，程序运行时，从Main方法开始执行
17         /// </summary>
18         /// <param name="args">参数</param 
19         static void Main(string[] args)
20         {
21             string RRG = "阮荣贵";
22             //字符串变量
23              string name = "OK";
24              //字符串数组变量
25              string[] names = new string[] { "Hello","World"};
26             //整型变量  -2147483648到2147483647
27             int myint = -2147483648;
28             uint myuint = 10;
29             long mylong = -2147483649;
30             ulong myulong = 2147483649;
31             //整型数组
32             int[] myints = new int[] { 1,2,3,4,5};
33             //单精度浮点型变量
34             float myfloat = 1.234f;
35             float[] myfloats = new float[] { 1.110f,1.25679F};
36             //双精度浮点型变量
37             double mydouble = 1.00000000;
38             double[] mydoubles = new double[] { 23.05,  32.05,  11};
39             //十进制型变量
40             decimal mydecimal = 1.000M;
41             //布尔型变量
42             bool isOk = false;
43             //布尔型数组
44             bool[] isOks = new bool[] { true,false};
45 
46             short myshort = 123;
47             short my16 = myshort;
48 
49             Int32 my32 = 456;
50 
51             Int64 my64 = 6400;
52 
53             
54 
55           
56         }
57     }
58     class myClass
59     {
60     }
61 }