基本数据类型操作

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Numerics;

namespace Ex03._04

{

class Program

{

static void Main(string[] args)

{

objectFunctionality();

dataTypeFunctionality();

charFunctionality();

parseFromString();

userDatesAndTimes();

userBigInteger();

Console.ReadKey();

}

static void objectFunctionality()

{

Console.WriteLine("类型继承测试:");

Int32 intValue = 12;

Console.WriteLine("{0}.GetHashCode()={1}", intValue, intValue.GetHashCode());

Console.WriteLine("{0}.Equals(23)={1}", intValue, intValue.Equals(23));

Console.WriteLine("{0}.ToString()={1}", intValue, intValue.ToString());

Console.WriteLine("{0}.GetType()={1}", intValue, intValue.GetType());

Console.WriteLine("{0}.GetTypeCode()={1}", intValue, intValue.GetTypeCode());

Console.WriteLine();

Console.Beep();

}

static void dataTypeFunctionality()

{

Console.WriteLine("数据类型展示:");

Console.WriteLine("Max of Int32:{0}", Int32.MaxValue);

Console.WriteLine("Min of Int32:{0}", Int32.MinValue);

Console.WriteLine("Max of Double:{0}", Double.MaxValue);

Console.WriteLine("Min of Double:{0}", Double.MinValue);

Console.WriteLine("Double.PositiveInfinity:{0}", Double.PositiveInfinity);

Console.WriteLine("Double.NegativeInfinity:{0}", Double.NegativeInfinity);

Console.WriteLine("Boolean.FalseString()={0}", Boolean.FalseString);

Console.WriteLine("Boolean.TrueString()={0}", Boolean.TrueString);

Console.WriteLine();

Console.Beep();

}

static void charFunctionality()

{

Console.WriteLine("Char类型功能展示:");

Char myChar = 'a';

Console.WriteLine("Char.IsDigit('{0}'):{1}", myChar, Char.IsDigit(myChar));

Console.WriteLine("Char.IsLetter('{0}'):{1}", myChar, Char.IsLetter(myChar));

Console.WriteLine("Char.IsLetterOrDigit('{0}'):{1}", myChar, Char.IsLetterOrDigit(myChar));

Console.WriteLine("Char.IsWhiteSpace('Hello World!',5):{0}", Char.IsWhiteSpace("Hello World!", 5));

Console.WriteLine("Char.IsWhiteSpace('Hello World!',6):{0}", Char.IsWhiteSpace("Hello World!", 6));

Console.WriteLine("Char.IsPunctuation('?'):{0}", Char.IsPunctuation('?'));

Console.WriteLine();

Console.Beep();

}

static void parseFromString()

{

Console.WriteLine("从字符串解析数据:");

Boolean b = Boolean.Parse("True");

Console.WriteLine("Value of b:{0}", b);

Double d = Double.Parse("99.98");

Console.WriteLine("Value of d:{0}", d);

Int32 i = Int32.Parse("63");

Console.WriteLine("Value of i:{0}", i);

Char c = Char.Parse("w");

Console.WriteLine("Value of c:{0}", c);

Console.WriteLine();

Console.Beep();

}

static void userDatesAndTimes()

{

Console.WriteLine("使用System.DateTime和System.TimeSpan");

//构造日期,年月日

DateTime dt = new DateTime(2012, 9, 14);

Console.WriteLine("这是{0}月的第{1}天", dt.Month, dt.Day);

Console.WriteLine("目前的日期:{0}", dt.ToShortDateString());

//增加2个月

dt = dt.AddMonths(4);

Console.WriteLine("增加2个月之后的日期:{0}", dt.ToShortDateString());

Console.WriteLine("目前是夏令时吗?:{0}", dt.IsDaylightSavingTime());

//构造时间,时分秒

TimeSpan ts = new TimeSpan(13, 25, 0);

Console.WriteLine(ts);

//减去15分钟

Console.WriteLine("减去15分钟:{0}", ts.Subtract(new TimeSpan(0, 15, 0)));

Console.Beep();

Console.WriteLine();

}

static void userBigInteger()

{

Console.WriteLine("使用大数BigInteger:");

BigInteger biggy = BigInteger.Parse("999999999999999999999999999999999999999999999999999999999");

Console.WriteLine("这是一个大数吗?{0}", biggy);

//是不是偶数

Console.WriteLine("Is this an even value?{0}", biggy.IsEven);

//是2的幂吗

Console.WriteLine("Is this a power of two?{0}", biggy.IsPowerOfTwo);

BigInteger reallyBig = BigInteger.Multiply(biggy, BigInteger.Parse("8888888888888888888888888888888888"));

Console.WriteLine("这可是个够大的数:{0}", reallyBig);

Console.Beep();

Console.WriteLine();

}

}

}