C# 图解教程 第二章 C#编程概述

C#编程概述

一个简单的C#程序

标识符

关键字

Main：程序的起始点

• C#程序的可执行起始点在Main中第一条指令
• Main首字母必须大写

从程序输出文本

Console.Write("This is trivial text.");

 
WriteLine

System.Console.WriteLine("This is text1.");
System.Console.WriteLine("This is text2.");
System.Console.WriteLine("This is text3.");

 
格式字符串

Console.WriteLine("Two sample integers are {0} and {1}.",3,6);

 
多重标记和值

Console.WriteLine("Three integers are {1},{0} and {1}.",3,6);

 
格式化数字字符串

Console.WriteLine("The value:{0}.",500);
Console.WriteLine("The value:{0:C}.",500);

对齐说明符

int myInt=500;
Console.WriteLine("|{0,10}|",myInt);
Console.WriteLine("|{0,-10}|",myInt);

格式字段

double myDouble=12.345678;
Console.WriteLine("{0,-10:G}--General", myDouble);
Console.WriteLine("{0,-10}--Default,same as General", myDouble);
Console.WriteLine("{0,-10:F4}--Fixed Point,4 dec places", myDouble);
Console.WriteLine("{0,-10:C}--Currency", myDouble);
Console.WriteLine("{0,-10:E3}--Sci.Notation,3 dec places", myDouble);
Console.WriteLine("{0,-10:x}--Hexadecimal integer",1194719);

标准数字格式说明符

注释

from: http://www.cnblogs.com/moonache/p/5995909.html

原文地址：https://www.cnblogs.com/GarfieldEr007/p/10126543.html