Programming Language ddg

Project Name: Dodgeball

Group Members: Sevda Gülen - Ceren Bülbül

How it runs?

• make dodgeball
• ./dodgeball2 < example1.ddg
• ./dodgeball2 < example2.ddg

     

1. BNF Form
   • Blocks and Commands
   • Expressions
   • Types
2. Explanation Of the Sysntax
3. Design Features

   

BNF Form

 

Blocks and Commands

• < program > : program < statements > program | STARTGAME program | ENDGAME | error

• < statement > : creationStatement | dieStatement | printnumberStatement | scannerStatement | IfElseStatement | IfElseifElseStatement | IfProvideOtherwiseStatement | whileStatement | asStatement | ifThenStatement | functionStatement | changeStatement | commentStatement | assignmentStatement | actionStatement | resultStatement | printStringStatement | boolStatement | heartStatement | funStatement | DDGStatement

• < heartStatement > : HEART

• < printStringStatement > : PRINT STRING

• < printnumberStatement > : PRINT term

• < assignmentStatement > : IDENTIFIER '=' exp

• < boolExpression > : term EQ term | term B term | term S term | term BE term | term SE term | term AND term | term OR term

• < funStatement > : FUN FUNNAME statements RETURN statements SEMICOLON

• < commentStatement > : COMMENT

• < creationStatement > : CREATE CHILDREN | creationStatement ROLE numericType | CHILDREN AND CHILDREN '=' TEAM

• < dieStatement > : DIE CHILDREN

• < scannerStatement ? : SCANNER

• < changeStatement > : CHANGE

• < boolStatement > : INTEGER EQ INTEGER | INTEGER B INTEGER | INTEGER S INTEGER | INTEGER BE INTEGER | INTEGER SE INTEGER | INTEGER AND INTEGER | INTEGER OR INTEGER | '(' boolStatement ')'

• < actionStatement > : CHILDREN ACTION numericType

• < IfProvideOtherwiseStatement > : IFPROVIDE expression statements OTHERWISE statements

• < IfElseStatement > : IF boolExpression exp ELSE exp SEMICOLON

• < IfElseifElseStatement > : IF expression statements elseifStatement ELSE statements

• < elseifStatement > : ELSEIF expression statements elseifStatement

• < ifThenStatement > : IF expression THEN statements

• < functionStatement > : CHILDREN ACTION | functionStatement numericType | ROLE numericType

• < asStatement > : AS expression statements

• < DDGStatement > : DDG

• < whileStatement > : WHILE term S term RETURN exp SEMICOLON | WHILE term B term RETURN exp SEMICOLON | WHILE term S term RETURN PRINT exp SEMICOLON | WHILE term B term RETURN PRINT exp SEMICOLON

• < resultStatement > : TEAM GAMERESULT AND TEAM GAMERESULT | GAMERESULT

 

Expressions

• < expression > : comparisonExpression | | actionExpression | orExpression| andExpression | boolExpression

• < exp > : term | exp '+' term | exp '-' term

• < boolExpression > : term EQ term | term B term | term S term | term BE term | term SE term | term AND term | term OR term

• < actionExpression > : CHILDREN ACTION

• < comparisonExpression > : numericType assignmentOperator numericType | IDENTIFIER assignmentOperator numericType | CHILDREN numericType assignmentOperator CHILDREN numericType '+' numericType | IDENTIFIER assignmentOperator IDENTIFIER

• < orExpression > : BOOL OR BOOL

• < andExpression > : BOOL AND BOOL

• < assignmentOperator > : EQ | BE | SE | B | S

 

Types

• < numericType > : STRENGTH | HEALTH | BALLSPEED | INTEGER

• < term > : INTEGER | IDENTIFIER

➡️ Bold text is token.

 

Explanation Of the Sysntax

▶️ First of all, to start writing code, STARTGAME should be written in ddg language. Also, ENDGAME should be written when your code runs out.

STARTGAME
//something//
ENDGAME

▶️ Comment process is written between 2 //.

▶️ There are several different ways you can create a child. You can create without specifying any feature, you can also create by specifying the team or role.

STARTGAME
CREATE SEVDA
CREATE CEREN ESCAPER(8)
ENDGAME

Created: SEVDA

Created: CEREN

▶️ There are assignments. A number can be assigned to an identifier.

▶️ Any string or numeric expressions can be printed. But the formats of string and numerical expressions are different.

STARTGAME
a = 5
PRINT:"LET'S START GAME"
PRINT:a
ENDGAME

LET'S START GAME

5

▶️ "AS" operation works like a loop. After the AS keyword, an expression followed by statements.

STARTGAME
s = 10
AS s > 2
  //something//
  s = s+2
ENDGAME

▶️ The "IFPROVIDE - OTHERWISE" process is used to compare the characteristics of two children. After IFPROVIDE, expression statements must write. After OTHERWISE a statement must write.

STARTGAME
IFPROVIDE SEVDA CATCHING
  s = s +5
OTHERWISE
  SEVDA ESCAPING
ENDGAME

▶️ A child should die when its health is finished.

STARTGAME
DIE SEVDA
ENDGAME

died: SEVDA

▶️ Children have actions. These are THROWING, ESCAPING, CATCHING. Also, these actions can be numeric types. For example, Throwing takes float numeric type(ballspeed). However, escaping and catching dont take any numeric type.

STARTGAME
BOB THROWING(4.6)
ROBI ESCAPING
ENDGAME

▶️ There are keywords to identify the winner or the loser when the game is over. These are; WIN, WON and DRAW. These are used for Teams.

STARTGAME
IFPROVIDE a < b 
  B WIN AND A LOST
OTHERWISE
  DRAW
ENDGMAE

▶️ It detects Boolean operations.

STARTGAME 
3==3
4>=6
ENDGAME

TRUE

FALSE

▶️ There are IF-ELSE statements for numerical expressions. This is not used in the game.

STARTGAME
IF 3<6 3 ELSE 6
ENDGAME

3

▶️ There is WHILE statement for numerical expressions. This While operation usues with semicolon. This is not used in the game.

STARTGAME
WHILE 3<7 RETURN PRINT:3;

i = 3
s = 5
WHILE i<6 RETURN s+2;
ENDGAME

3

3

3

3

21

▶️ There is function statement. It can be used like method. The function statement has keywords. These are; FUN and a function name(it must be lowercase) and RETURN.

STARTGAME
FUN functionname: IF 2>3 2 ELSE 3; RETURN a = 3-2;
ENDGAME

3

▶️ It is included in the "error handling" section of this language. If you enter something wrong, the "Wrong Grammar" error works. Making a mistake will not shut down the system. After receiving the error message, writing code can continue.

STARTGAME
ASdsks;

Wrong Gramer

 

Design Features

This language, as the name implies, is a language made for "dodgeball" game. It is a language inspired by the movements, players and situations made while playing this game. At the same time, primitive calculations can be done in boolean operations, if else, function definition and loop. There are some features that distinguish this language from other languages and make it good:

🔸 Features that are not available in other languages have been added in this language. With these features, processes that take a very long time can be done in a short time.

🔸 It is easy for people to perceive and understand because it is very similar to the daily writing language.

🔸 Since there is an error handling, the system does not throw itself out in every written error. After making the mistake, you can continue to correct the error and write code.

🔸 Apart from being a different language, transactions in primitive languages are also included. Thus, it is a language that will be more familiar to people.

🔸 Instant transactions can be printed. In this way, you will understand and see if your code is going wrong or not.