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:




:

































 

 

 

 


, , Char.




// ,

// Char.

using System;

using System.Globalization;

class CharDemo {

static void Main() {

string str = " . $23"; int i;

for(i=0; i < str.Length; i++) {

Console.Write(str[i] + " "); if(Char.IsDigit(str[i]))

Console.Write(" "); if(Char.IsLetter(str[i]))

Console.Write(" "); if(Char.IsLower(str [i]))

Console.Write(" "); if(Char.IsUpper(str[i]))

Console.Write(" "); if(Char.IsSymbol(str[i]))

Console.Write(" "); if(Char.IsSeparator (str[i]))

Console.Write(" "); if(Char.IsWhiteSpace (str [i]))

Console.Write(" "); if(Char.IsPunctuation(str [i]))

Console.Write(" ");

Console.WriteLine(" : " + str);

// .

string newstr = "";

for(i=0; i < str.Length; i++)

newstr += Char.ToUpper (str[i], Culturelnfo.CurrentCulture);

Console.WriteLine(" : " + newstr);

}

}

.

.

$

: . $23 : . $23

Boolean

Boolean bool. , , . 21.10. , .

Public static readonly string FalseString public static readonly string TrueString

true false . , FalseString - WriteLine (), "False".

Boolean : I Comp able, IComparable<bool>, IConvertible IEquatable<bool>.

 

 

 

Public int CompareTo(bool

 

 

value ).

 

value. , ; , false, value true; , , , true, value false

 

Public int

 

 

CompareTo(object obj)

 

obj. , ; , false, obj true; , , , true, obj false

 

public bool Equals(bool obj)

 

true, obj

 

Public override bool

 

true,

 

Equals(object obj)

 

obj

 

Public override int

 

-

 

GetHashCode()

 

Public TypeCode

 

TypeCode

 

GetTypeCode()

 

Boolean, .. TypeCode. Boolean

 

Public static bool

 

bool

 

Parse(string s)

 

s. s Boolean. TrueString, Boolean. FalseString, FormatException, , :

 

Public override string

 

,

 

ToString()

 

, TrueString, FalseString

 

Public string

 

 

ToString(IFormatProvider

 

,

 

provider)

 

TrueString, FalseString. provider

 

Public static bool

 

 

TryParse(string s, out

 

s bool.

 

bool result)

 

result true. s Boolean. TrueString, Boolean. FalseString, false, , : , Parse (),

 

Array

Array System. #. , C# . , Array, . 21. 11, . 21. 12.

Array : ICloneable, ICollection, IEnumerable, IStructuralComparable, IStructuralEquatable, IList. , ICloneable, System. Collections, 25.

I Comparer IComparer<T>. IComparer System. Collections. Compare () , .





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