«C# dasturlash tili» O’quv qo’llanma

Instruksiyaning ketma-ketmaligi.

1. 
   YAngi fayl yarating va uni Help classdemo.cs. shaklida nomlang. Chunki programmaning kodiga Qaytmasligi uchun va uni help 3.cs. fayli orQali nusxa olinadi.
   

Koddan o’zgaruvchan ekzemplyarga yetshish uchun bu o’zgaruvchan aniQlangan sinfni bir Qismi bo’lgan ob’ektni nomi operator nuQta va o’zgaruvchini ismi ko’rsatilishi zarur. Shu o’zgaruvchan aniQlangan sinfni bir Qismi bo’lgan koddan o’zgaruvchan ekzemplyarga yetishish uchun to’g’ridan-to’g’ri o’zgaruvchanni ismini ko’rstish mumkin.
2. Argument – bu metodni chaQirishda unga beriladigan Qiymat.
3. Metoddan boshQaruvni Qaytarish Return operatori yordamida amalga oshirilishi mumkin. Agar metod void tipga ega bo’lsa, metod chaQirib olinganni Qaytarish yopiQ figurali Qavs bilan amalga oshiriladi. BiroQ (ne- void) tipdagi Qiymatni Qaytarish uchun Return operatoridan foydalanish zarur, ya’ni yopiQ figurali Qavsga erishilganda metoddan boshQaruvni Qaytarish mumkin emas.
1. helpon () usulini yaratish.
Public void helpon (char what) (switch (what) ( case ‘1’:
Console.Writeline (“operator”if:g’n”);
Console.Writeline (“if(condition)ststement;”);
Console.Writeline (“else ststement;”);
Break;
Case ‘2’:
Console.Writeline (“operator switch:g’n”);
Console.Writeline (“switch expression)(“);
Console.Writeline (“ case constant:”);
Console.Writeline (“ statement sequence”);
Console.Writeline (“break ;”);
Console.Writeline (“ G’G’ ”);
Console.Writeline (“ (”);
Break;
Case ‘3’:
Console.Writeline (“Sikl for :g’n”);
Console.Writeline (“while(condition;iteration)”);
Console.Writeline (“statement;”);
Break;
Case ‘4’:
Console.Writeline (“sikl while:g’n”);
Console.Writeline (“while (condition) statement;”);
Break;
Case ‘5’:
Console.Writeline (“sikl do-while:g’n”);
Console.Writeline (“do (“);
Console.Writeline (“ (“statement;”);
Console.Writeline (“)while (condition);”);
Break;
Case ‘6’:
Console.Writeline (“operator break:g’n”);
Console.Writeline (“Break; or break label;”);
Break;
Case ‘7’:
Console.Writeline (“operator continue:g’n”);
Console.Writeline (“continue;or continue label;”);
Break;
Case ‘8’:
Console.Writeline (“operator goto:g’n”);
Console.Writeline (“goto label;”);
Break;
Console.Writeline ();
4. showmenu () usulini yaratish ketma-ketligi:
Public void showmenu () (

Console.Writeline (“sintaksisda ma’lumotnoma:”);

Console.Writeline (“ 1.Operator if”);
Console.Writeline (“ 2.Operator switch”);
Console.Writeline (“ 3.Davr for”);
Console.Writeline (“ 4.Davr while”);
Console.Writeline (“ 5. Davr do-while”);
Console.Writeline (“ 6.Operator break”);
Console.Writeline (“ 6.Operator break”);
Console.Writeline (“ 7.Operator continue”);
Console.Writeline (“ 8.Operator gotog’n”);
Console.Writeline (Davr yoki operator tartib nomeriga Qaytish:”);
Console.Writeline (programmada ishni tugallash uchun q ga Qaytish:”);
)

5. Is valid () usulini yaratish:

Public bool isvalid (char ch) ( if (ch ‘1’ I ch> ‘8’  ch Iq ‘q’)return false;
Else return true;
6. Help sinfidagi usulni yarating:
Class Help
Public void helpon (char what) (switch (what)
( case ‘1’:
Console.Writeline (“operator”if:g’n”);
Console.Writeline (“if(condition)statement;”);
Console.Writeline (“else statement;”);
Break;
Case ‘2’:
Console.Writeline (“operator switch:g’n”);
Console.Writeline (“switch expression)(“);
Console.Writeline (“ case constant:”);
Console.Writeline (“ statement sequence”);
Console.Writeline (“break ;”);
Console.Writeline (“ G’G’ ”);
Console.Writeline (“ (”);
Break;
Case ‘3’:
Console.Writeline (“Sikl for :g’n”);
Console.Write (“for(init; condition;iteration)”);
Console.Writeline (“statement;”);
Break;
Case ‘4’:
Console.Writeline (“sikl while:g’n”);
Console.Writeline (“while (condition) statement;”);
Break;
Case ‘5’:
Console.Writeline (“sikl do-while:g’n”);
Console.Writeline (“do (“);
Console.Writeline (“ (“statement;”);
Console.Writeline (“)while (condition);”);
Break;
Case ‘6’:
Console.Writeline (“operator break:g’n”);
Console.Writeline (“Break; or break label;”);
Break;
Case ‘7’: Console.Writeline (“operator continue:g’n”);
Console.Writeline (“continue;or continue label;”);
Break;
Case ‘8’:
Console.Writeline (“operator goto:g’n”);
Console.Writeline (“goto label;”);
Break;
Console.Writeline ();

Public void showmenu () (

Console.Writeline (“sintaksisda ma’lumotnoma:”);
Console.Writeline (“ 1.Operator if”);
Console.Writeline (“ 2.Operator switch”);
Console.Writeline (“ 3.Davr for”);
Console.Writeline (“ 4.Davr while”);
Console.Writeline (“ 5. Davr do-while”);
Console.Writeline (“ 6.Operator break”);
Console.Writeline (“ 6.Operator break”);
Console.Writeline (“ 7.Operator continue”);
Console.Writeline (“ 8.Operator gotog’n”);
Console.Writeline (Davr yoki operator tartib nomeriga Qaytish:”);
Console.Writeline (programmada ishni tugallash uchun q ga Qaytish:”);
)

Public bool isvalid (char ch) ( if (ch ‘1’ I ch> ‘8’  ch Iq ‘q’)return false;

Else return true;
7. Proekt 3-3 dan main usulini yangi help sinfi orQali yozish. Bu asosiy sinfni Main () Help Class Demo .cs. nomi bilan nomlaymiz.
Usul to’liQ shaklda pastda keltirilgan.
Proekt 4-1.
Proekt 3-3 ma’lumotnoma help sinfiga asoslangan.
Using System;
Class help;
Public void helpon (char what)
(switch (what)
( case ‘1’:
Console.Writeline (“operator”if:g’n”);
Console.Writeline (“if(condition)statement;”);
Console.Writeline (“else statement;”);
Break;
Case ‘2’:
Console.Writeline (“operator switch:g’n”);
Console.Writeline (“switch expression)(“);
Console.Writeline (“ case constant:”);
Console.Writeline (“ statement sequence”);
Console.Writeline (“break ;”);
Console.Writeline (“ G’G’ ”);
Console.Writeline (“ (”);
Break;
Case ‘3’:
Console.Writeline (“Sikl for :g’n”);
Console.Write (“for(init; condition;iteration)”);
Console.Writeline (“statement;”);
Break;
Case ‘4’:
Console.Writeline (“sikl while:g’n”);
Console.Writeline (“while (condition) statement;”);
Break;
Case ‘5’:
Console.Writeline (“sikl do-while:g’n”);
Console.Writeline (“do (“);
Console.Writeline (“ (“statement;”);
Console.Writeline (“)while (condition);”);
Break;
Case ‘6’:
Console.Writeline (“operator break:g’n”);
Console.Writeline (“Break; or break label;”);
Break;
Case ‘7’: Console.Writeline (“operator continue:g’n”);
Console.Writeline (“continue;or continue label;”);
Break;
Case ‘8’:
Console.Writeline (“operator goto:g’n”);
Console.Writeline (“goto label;”);
Break;
Console.Writeline ();

Public void showmenu () (

Console.Writeline (“sintaksisda ma’lumotnoma:”);
Console.Writeline (“ 1.Operator if”);
Console.Writeline (“ 2.Operator switch”);
Console.Writeline (“ 3.Davr for”);
Console.Writeline (“ 4.Davr while”);
Console.Writeline (“ 5. Davr do-while”);
Console.Writeline (“ 6.Operator break”);
Console.Writeline (“ 6.Operator break”);
Console.Writeline (“ 7.Operator continue”);
Console.Writeline (“ 8.Operator gotog’n”);
Console.Writeline (Davr yoki operator tartib nomeriga Qaytish:”);
Console.Writeline (programmada ishni tugallash uchun q ga Qaytish:”);
)

Public bool isvalid (char ch) ( if (ch ‘1’ I ch> ‘8’  ch Iq ‘q’)return false;

Else return true;

)

)
Class HelpClassDemo (
Public static void Main ( ) (
Char choice;
Help hlpobj-new Help;
For(;;) (
Do (
Hlpobj. Showmenu ( );
Do (
Choiceq(char) Console.Read ( );
)while (choiceqq ‘g’n’(choiceqq ‘g’r’);
While (lhlpobj.isvalid(choice) );
If (choice qq ‘q’)break;
Console. WriteLine(“g’n”);
Hlpobj.helpon(choice);
)
)
)
Programmani testdan o’tkazilganda funksiya o’zgarmasdan Qoldi. Bu programma prorammist uchun ma’lumotnoma bazasi sistemasi vazifasini bajaradi.