Лабараторки_Плотников(теория_и_задания) / Лабораторная работа ППП 3

2

, .

.

1.

, System.Console.Write() System.Console.WriteLine(), . - , -

.

int

value:

int value = 250;

-

:

System.Console.WriteLine ("value =" + value);

: value = 250

value,

( 5):

System.Console.WriteLine("value = {0, 5}", value);

– 0, value

System.Console.WriteLine(). -

, -

. 5. -

-

41

. ,

.

-

:

int a = -12; int b = 20;

System.Console.WriteLine("a = {0, 4}, b = {1, 3}", a, b);

: a = -12, b = 20

. , double myDouble: double myDouble = 1234.56789;

myDouble,

42

: myFloat = 1234.568; myDecimal 1234.568;

WriteLine Write

{n, w: k} – n

WriteLine, -

– , w –

, (), k –

.

-

. 2.1.

2.1

W

W:Fk

W:Ek

W

W

F, E (-

. 2.2) –

43

. k – -

:

, ( F);

,

E G).

:

2.2

44

1. . public static void Main()

{

int a = -14;

float c = -0.00151f; double i = 1234.56789; bool l=false;

string name="Petrov"; System.Console.WriteLine("name = {0, 6}, l = {1, 4}", name,l); System.Console.WriteLine("a ={0, 4}, c = {1,10:f5}, i = {1,20:e8}", a,c,i); System.Console.WriteLine(" "); System.Console.WriteLine(" Enter");

System.Console.ReadLine();

}

45

a = Convert.ToInt32(Console.ReadLine());

Console.WriteLine("Input c");

c = Convert.ToSingle(Console.ReadLine());

Console.WriteLine("Input i");

i = Convert.ToDouble(Console.ReadLine());

Console.WriteLine("Input l");

l = Convert.ToBoolean(Console.ReadLine());

46

System.Console.WriteLine("

\n name = {0, 6}, l = {1, 4}",

name,l);

System.Console.WriteLine("a ={0, 4}, c = {1,10:f5}, i = {2,20:e8}", a,c,i); System.Console.WriteLine(" "); System.Console.WriteLine(" Enter");

System.Console.ReadLine();

}

#-

, . (stream)

– , . -

(-

, ) (, -

, ). ,

, -

.

.

-

-

47

StreamWriter fileOut = new StreamWriter(new

FileStream("text.txt", FileMode.Create,

FileAccess.Write));

:

FileStream(string filename, FileMode mode, FileAccess how)

:

48

1. filename mode ,

;

2. how,

,

FileAccess:

StreamWriter:

StreamWriter(string name, bool appendFlag), name ;

appendFlag true – - , false – - .

:

StreamWriter fileOut=new StreamWriter("t.txt", true);

fileOut

WriteLine. :

fileOut.WriteLine("test");

t.txt

test.

49

StreamReader

. -

:

StreamReader(Stream stream),

stream -

. ArgumentException, stream .

, StreamWriter

:

StreamReader fileIn = new StreamReader(new FileStream("text.txt", FileMode.Open, FileAccess.Read));

StreamWriter StreamReader , -

:

StreamReader (string name);

name .

-

:

StreamReader fileIn=new StreamReader ("z:\temp\t.txt");

C# Unicode. ,

,

, , , ,

StreamReader:

StreamReader fileIn=new StreamReader ("z:\temp\t.txt", Encoding.GetEncoding(1251));

Encoding.GetEncoding(1251) , Windows-1251 (