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Programming with C / AL for Microsoft Business Solutions Navision - Presentation Transcript

Programming Language C / LA for Microsoft Business Solutions Navision Pablo Espada Well www.esbupa.com

www.programadorautonomo.net Note: Microsoft, Navision, C / AL, etc ... are trademarks of Microsoft

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2. I usually devote to training and development work and consulting. NET

Also impart training on Navision Development

If you want to work with you giving them training or developing a project, please contact:

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www.programadorautonomo.net

www.esbupa.com

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Language C / AL - Index3.

Data Types

Variables

Features

Operators

Judgments

Allocation

Decision (IF, CASE)

Iteration (FOR, REPEAT, WHILE)

Other

Comments

Tables

Object Access

Forms

Information

Source Units

Dataports

Common Functions

SumIndexFields

Flowfields

Dialogues

File Access

Scrubber

Tracking Code

Code Wizard

OCX

BLOB

Standard Format

Introduction4.

http://translate.googleusercontent.com/tr

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4GL language environment to work in Navision

Specialized work on relational DB

Integrated in Windows environment

OCX to access data from other applications

File Access

Data Types5.

Key variables: Numeric

Integer

Numbers between 2147483647 and +2,147,483,647.

BigInteger

64-bit number.

L is used to indicate that is a long integer: bi: = 3983200032984209L.

Decimal

Numbers and +10 E63-10E63.

18 significant digits.

Char

A character between 0 and 255, freely convertible to whole character.Operable as an integer or a character:

C: = 'A';

C: = S [2];

C: = C + 1;

Option

Option number between 2147483647 and +2,147,483,647, freely convertible at the option entirely.The options are the property symbolically declare the variable OptionString: OptionString = Offer,

Order, Invoice, Payment

Data Types (II)6.

Key variables: String

Text

Chains of up to 250 characters.

Their characters are indexed:

Name [3]

Code

Strings of up to 250 characters.

Capitalized.

The system automatically does the conversion, and removes leading and trailing spaces. His

characters are indexed:

CodFormasPago [3]

Data Types (III)7.

Key variables: Date and Time

Date

Stores a date.

0D is initialized.

today: = 220704D;

Time

Store an hour


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0T is initialized with

Time: = 123000T;

DateTime

Stores a UTC time.Always adapted to local time display

0T is initialized with

DateTime: = December 31, 2004, 14:20:59.999.;

Data Types (and IV)8.

Key variables: Boolean

Boolean

Logical values: TRUE or FALSE

Complex Types9.

C / AL includes a set of complex types used in certain cases

BLOB

Used to store binary (images, files, videos, etc. ..) and is stored outside the record of the

database.2GB Max Size

Record

A record is associated with a record of each table.

Access to fields is done by writing the name of the record, a point and the field name:

EJ: Customer. "No."

Complex Types (II)10.

Form

It represents a form.Each form is composed of a set of controls

Report

Represents a Report

Codeunit

Container code, organized in functions

File

File Type. It gives access to a file system file

Complex Types (III)11.Dialog

Represents a dialog box.

DateFormula

Represents a formula for the function CALCDATE

GUID


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Unique Identifier of the system.16 bytes:

12345678-1234-1234-1234-1234567890AB

TableFilter

Lets you apply a filter to a table.Only used for Permits

Complex Types (IV)12.

RecordRef

Pointer to a registry.It differs from the type Record that, a priori, know the table that will write.

The fields are equivalent FieldRef

The key is the equivalent keyref

RecordID

Stores the ID of the table with Primary Key.

InStream and OutStream

Can read and write BLOB's

Variant

Undefined type required for the use of OCX

Contains: record, file, action, codeunit, Automation, boolean, option, integer, decimal, char, text,

code, date, time, binary, DateFormula, TransactionType, InStream and OutStream.

BigText

Similar to the BLOB but only for text content.MAX 2GB

Variables13.

Initialization

C / AL variables initialized to default values:

Boolean: FALSE

Numeric: 0

Strings:''

Date: 0D

Time: 0T

Variables (II)14.

Definition

Variables in C / AL can be:

Local: Its scope is the function which defines

Global: Its scope is the object which defines

Variables (III)15.

Example:

We will create a new CodeUnit

Define a set of variables (local and global)


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Option can create a variable and display their values as follows:

MESSAGE ('The value of% 1 is% 2', 'LoopNo' LoopNo)

Variables (IV)16.

Arrays and matrices

Property is defined Dimensions variable

Dimensions = 4, 3

Brackets is the reference

SaldoCtaBanco [2,2]

indices have range 1 ... n

Features:

CLEAR (Clear all Array)

Arrayl (Returns the length of the array)

System Variables17.

System variables (system-defined variables)

C / SIDE creates and makes available to the programmer in certain contexts

Rec

When you edit a record, Rec contains the record in its modified state.

xRec

When you edit a record, xRec contains the record before the amendment.

CurrForm

Variable that represents the current Form object.

CurrReport

Variable that represents the current Report.

RequestOptionsFormVariable that represents the input dialog form object Current Report.

CurrFieldNo

The field number of the current field from what was called the trigger.

Features18.

Definition

The function is defined with a name, a number of optional parameters and optional return value.They

can have local variables.

The parameters can be by reference (amending its value, eg "value") or by value (the value is not

altered, eg: "flag")

Can be called from other objectsOperators19.

Operator C / AL Meaning

.camp registration form or report control

() Parentheses

[] Indexing

:: Scope

+ Sum

- Subtract

* Multiply


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/ Division

DIV integer division

MOD rest

> Greater than

> = Greater than or equal to

= Value2) AND (Value1


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[] Indicates optionality in that part of the sentence.

A statement block contains a set of statements between BEGIN and END;

Begin

..

End;

A returns a value.

A assigns the value expression result to a variable.The field name, if it contains spaces or special characters, is written in "quotes"

Sentences (I)24.

Allocation

Assignment Operator

today: = 220704D;

value: = 4;

As a result of function call

Return value of a function

Function square (value: Integer) Quad: Integer

Beginsq: = value * value

End;

value: = Square (3), / / value is equal to 9

Passing parameters by reference to a function

Cube Function (VAR value: Integer)

Begin

value: = value * value * value

End;

value: = 2;

Cube (value) / / value is equal to 8

Chain Operator25.

The symbol '+' is used to concatenate strings

What happens if we make an allocation of a string with the concatenation of two others, and this

result is larger than the chain?

There is a runtime error

We can solve the overflow by checking first:

MAXSTRLEN you return the maximum string size

COPYSTR lets you copy n characters from a string to another.Use F5 (Symbol menu) to help

Sentences (II)26.

Decision

IF

Evaluate the condition, if true execution of the IF statement block, otherwise the ELSE Part.

IF THEN

[ELSE

]


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Example

IF (Quantity = 0) AND ("Invoiced Amount" 0) THEN

Testfield (Order No. mov. Asoc product. ")

ELSE BEGIN

IF Quantity "Invoiced Amount" THEN

Testfield ("Invoiced Amount", 0);

Testfield (Order No. mov. Asoc product. ", 0);

END;

Examples27.Modify the above form as follows:

Variables Definition Execute Execute OnPush Clear

Examples28.

Add what is necessary to calculate the average units sold / bought

Accountants of times you buy / sell

Total Sales / Shopping

Examples29.

On the example above, add the TextBox a list of 10 and 10 decimal Array

We must make every time you click the Run button, the result is displayed in a different position from

Array

Sentences (II I)30.

Decision

CASE

Evaluates the expression and executes the statement block of corresponding value. If there is an equal

value, execute the judgments of the ELSE block.

CASE OF

: ;

...

:

[ELSE ]

END;

Example

CASE "Type amount" OF

Type "value":: Balance: ValorCol: = CGCta. "Pptdo amount."

Type "amount":: Please:

BEGIN

ValorCol: = CGCta. "Should be budgeted"

Do: = TRUE;

END

ValorCol ELSE: = CGCta. "To have budgeted"

END;

Sentences (IV)31.

Iteration

FOR


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Repeats a set of statements until the result of the assignment expression reaches the value

indicated

FOR TO / DO DOWNTO

Example

FOR j: = Tasks DOWNTO 1 DO BEGIN

Inclination [j]: = Inclination [j - 1];

Constant [j]: = Constant [j - 1];MaxValImport [j]: = MaxValImport [j - 1];

END;

Sentences (V)32.

Iteration

REPEAT ..UNTIL

Repeats a set of statements until the expression evaluates to TRUE.

REPEAT

UNTIL

Example

('-') THEN IF CGCta.FIND

REPEAT

Result: = Result + CalcCGCta (CGCta, ColumEsqCta)

Num: = Num + 1;

UNTIL CGCta.NEXT = 0;

Sentences (VI)33.

Iteration

WHILE ..DO

Repeat the set of statements until the next END if the expression evaluates to TRUE

DO WHILE

[END;]

Example

LinComentVenta.SETRANGE ("Document Type", "document type");

LinComentVenta.SETRANGE ("No." "No.");

('-') DO BEGIN WHILE LinComentVenta.FINDLinComentVenta.DELETE;

LinComentVenta. "Document Type": = CabVta. "Document Type";

LinComentVenta. "No.": = CabVta. "No."

LinComentVenta.INSERT;

END;

Sentences (and VII)34.

Other


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WITH

The statements inside the WITH refer to the registration form, etc.

Clie DO BEGIN WITH

"No.": = '1 ';

Name: = 'Pepe';

Address: = 'Rue the Barnacle, n 13';

City: = "Niu wept ';

END;

EXIT

Leave a segment of code or function (you can return the value)

Absolute FUNCTION (value: Integer) ret: Integer

BEGIN

IF (value


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Triggers table:

OnInsert.It runs when you insert a record into the table.

OnModify.It runs the modiicar a field in a table row.

OnDelete.It runs to delete a table row.

OnRename.It runs when editing a field that is part of the primary key of a table row.

Releases of fields in the table:

OnValidate.It runs to change the value of a field.

OnLookup.It runs when you press F6 on the field to find a value.

Functions defined in a tableYou can define functions in the table and call them from the object itself or from other objects.

Tables (II)41.

To access the variables defined tables Record type

Modifying fields in the table:

By assigning values.

Clie: Record (Client) / / Variable type Clie record / / customer table

Clie. "No.": = '10 ';

Clie. "Name": = 'Pepe';

With the ruling Validate, assigns the value and executes the trigger OnValidate each field assignedto the Customer table.

Clie: Record (Client);

Clie.VALIDATE ("No.", '10 ');

Clie.VALIDATE (Name, 'Pepe');

Tables (II I)42.

Working with records from the table:

Initialization. Is set each field in the record to its default value depending on its type.

Clie: Record (Client);

Clie.INIT;Insertion of records in the table.With the INSERT statement and a parameter that indicates

whether the trigger executes OnInsert of the table or not.


Clie.VALIDATE (Name, 'Pepe');

...

Clie.INSERT (TRUE);

Amendment of records in the table.Judgement MODIFY with a parameter that indicates whether

the trigger executes OnModify of the table.

Clie.VALIDATE (Name, 'Luis');

Clie.MODIFY (TRUE);

Tables (IV)43.

Working with records from the table:

Deleting records in the table.By DELETE statement and a parameter that indicates whether the

trigger executes OnDelete of the table or not.

Clie.DELETE (TRUE);

Changing fields of records in the table as part of the primary key. Judgement RENAME with a

parameter that indicates whether the trigger executes OnRename of the table.


Clie.RENAME (TRUE);


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Tables (V)44.

Finding records in a table:

Get a record from a table by its primary key.

Job.GET (N ."); Job

Job.TESTFIELD (Blocked, FALSE);

In previous statements we obtain a Job table row (Case GET) and found that one of the fields in

the record has the value indicated (testfield)

Get one or more record in a table for secondary keys.

Clie.RESET;

Clie.SETCURRENTKEY (Name, Address, City);

Clie.SETRANGE (Name, 'Luis');

Clie.SETFILTER (City, '% 1 |% 2', 'Paris', 'Rome');

First act on the Clie variable filters and removing all previous ranges (RESET).Activate a key bywhich we will seek (SETCURRENTKEY) for setting search ranges and registration is based on thekey indices to be more effective. Filters are set with two functions: SetFilter SetRange andbasically the same but SetFilter allows for more complex conditions. It is advisable to set filters on

fields in the order they appear on the primary key.Clie currently contains all records that meet the

conditions of the filters.

45. Tables (VI)46.Finding records in a table:

Traverse table records

('-') THEN IF Clie.FIND

REPEAT

registro> 0 finds the next record skipping the indicated number


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IF ListaClientes.RUNMODAL = ACTION:: LookupOK THEN BEGIN

ListaClientes.GETRECORD (Clie)

cliente.validate (Clie. "No.");

CLEAR (ListaClientes)

END;

Suitable filters are set in the variable type Clie Client Record.

ListaClientes is of type Form.

SETTABLEVIEW set the form view and set the client ListaClientes asset by SETRECORD.

LOOKUPMODE serve causes the form to retrieve data.GetRecord get the record marked.

CLEAR removes the form.

Object Access48.

Form:

Shortcut:

('-'); CGMov.FIND

FORM.RUN (FORM:: "Movs. Accounting," CGMov)

IF FORM.RUNMODAL (216 LinPptoProy) = ACTION:: LookupOK THEN BEGIN

"Cod. Phase": = LinPptoProy. "Cod.phase ";"Cod. Subphase": = LinPptoProy. "Cod.subphase "

"Cod. Task": = LinPptoProy. "Cod.task ";

END;

Variable access:

ListCtaCG: Form "Accounts List"

ListCtaCG.LOOKUPMODE (TRUE);

IF ListCtaCG. RUNMODAL = ACTION:: LookupOK THEN ...

FormNavegar: Form "Browse"

FormNavegar.DefDoc ("Registration Date", "No.");

FormNavegar. RUN;

Access Objects (II)49.

Report:

Shortcut:

Clie.SETRECFILTER / / put a filter (in the primary key) / / for the Report to run only on the / / Current

Customer

REPORT. RUN (REPORT:: "Inf-example" ReqForm, FALSE, Clie)

REPORT. RUNMODAL (REPORT:: "Inf-example", FALSE, Printer, Clie)

Variable access:

r: Report Supplier - Lines orders ";

Clear (r);

Prov.SETRECFILTER;

r.SETTABLEVIEW (Prov)

r.RUNMODAL;

...

r.RUN;


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Access to Objects (and III)50.

Codeunit:

It performs the function of the Codeunit RUN

Shortcut:

IF CODEUNIT. RUN (22, LinDiaProd) THEN

...

Variable access:DiaGenTestLin: Codeunit "Dia.Test Gen-line ";

DiaGenTestLin. RUN (LinDiaGen)

/ / LinDiaGen may have changed (VAR)

Forms51.

Where enter code

Form Releases:

OnAfterGetRecord.It runs the recurperar a record of the table, but before displaying the

registration form.

Triggers form controls.Buttons on the form:

Command Button

Menu Button: In each of the Menu Items

Functions defined in a form:

You can define functions in the form and call them from the object itself or from other objects.

In any case, the code must be written in the table if possible!

Forms (II)52.

After retrieving a record from the table, but before it is displayed in the form OnAfterGetRecord

trigger execution.

Ex: Before showing the registration, apply a filter and calculates the value of a SumIndexField

showing on the form.

Forms (and III)53.

Clicking on a button or a menu option in a dropdown button runs the trigger OnPush.

Example: We can invoke a function in a one-parameter Codeunit.

Information54.

Where enter code

Releases of the report:

OnPreReport.Is processed before running the report.

Releases of each DataItem:

OnPreDataItem. It runs before the DataItem is processed.

OnAfterGetRecord. It runs every time you get a record.

OnPostDataItem. Is executed after the processing of DataItem.

Report Request Form.

Functions defined in a report.

Sections of the form:


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OnPreSection. It runs before a section is processed.

OnPostSection. It runs after a section is processed.

Reports (II),55.

Before the execution of a trigger Report OnPreReport runs.

Example: We can use the filters for which the Report has been called, and then print them in a

section Header (FiltClient and FiltMovProducto).

Reporting (II I)56.

Before the implementation of a DataItem OnPreDataItem fires.

Example: We can use it to maintain a field total for a section with the function CREATETOTALS

FOOTER.You can also set a record for page NEWPAGEPERRECORD function, if we chose the

option in the Request Form.

After obtaining a record of running OnAfterGetRecord DataItem.

Example: We can make calculations for a value that is printed (Bf gross).You can also call

NewPage from this trigger to change the page.

With CurrReport.SKIP can skip the iteration of the DataItem.

Reports (and IV)57.

Before showing a section OnPreSection runs.

Example: We want to show the section or not (SHOWOUTPUT function), or perform computations

for a value printing.

Code Units58.

Where enter code

OnRun function:

Is created by default with a new codeunit.

It is the entry point for execution by default.

You can have a record as parameter.

Codeunit Functions:

If you create a function in a Codeunit can be invoked from other objects:

DiaGenTestLin: Codeunit "Dia.Test Gen-line ";

DiaGenTestLin. Tester (LinDiaGen)

Dataports59.

Where enter code

DataPort Triggers

OnPreDataport.Before the implementation of the Dataport.

OnPostDataport. After the execution of the Dataport.

DataItem Triggers

OnPreDataItem (). Before processing the DataItem.

OnBeforeExportRecord (). Before you export a record.

OnAfterExportRecord (). After you export a record.

OnBeforeImportRecord (). Before importing a record.

OnAfterImportRecord (). After importing a record.


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OnPostDataItem (). After processing a DataItem.

The Dataport Request form

Features Dataport

Dataports (II)60.

A Dataport can import data and add them to a table.

Example: Add records to a newspaper.Need before starting to learn that "No line will have the firstregistration of imported

Dataports (III)61.

Before processing a DataItem.

Example: A Dataport function is called before invoking the Dataport, then run the Dataport and set

a filter on a field of the DataItem. FiltroNoCampaa variable does not lose its value between the

two calls is not running CLEAR.

Dataports (and IV)62.

After importing the registry, and before inserting into the table.

Example: Seeking a new line number and fill the description field.

Common Functions63.

Other commonly used functions:

RESET

Delete key selection filters and a variable Record

DesdeLMComp.RESET;

DesdeLMComp.SETRANGE (LM No. "" No product ");DesdeLMComp.SETRANGE (Type, DesdeLMComp.Tipo:: Product)

('-'); DesdeLMComp.FIND

NoSigLin: = "Line No."

COUNT

Count the number of records.

DesdeLMComp.SETRANGE (LM No. "" No product ");

DesdeLMComp.SETRANGE (Type, DesdeLMComp.Tipo:: Product)

NoCompoLM: = DesdeLMComp.COUNT;

Common Functions (II)64.

COPY

Copy a Record variable in another of the same table, active filters and keys.

NuevoClie: = COPY (Clie)

TRANSFERFIELDS

Copy the contents of the fields in a record variable to another that does not have to be of

the same table.It takes into account the number of campo.Los fields that do not have

matching numbers are set to their default values.

RegHasta: = TRANSFERFIELDS (RegDesde)


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Common Features (III)65.

EVALUATE

Convert a value from one type to another.

Value: = '010196 ', / / type string

Ok: = EVALUATE (VarInteger, Value); / / Integer = 10 196

Ok: = EVALUATE (VarDate, Value) / / Date = 010196D

FORMAT

Convert a value into a string

MESSAGE ('Today is% 1', FORMAT (TODAY));

Common functions (IV)66.

Deleteall

Delete a series of records in a table

LinExtCtaBanco.SETRANGE ("N bank", "N bank");LinExtCtaBanco.SETRANGE ("No abstract", "No Abstract");

LinExtCtaBanco.DELETEALL;

MODIFYALL

Modify a number of records in a table

CGMov.RESET;

CGMov.SETCURRENTKEY ("Account No.");

CGMov.SETRANGE ("Account No." CGCta. "No.");

CGMov.MODIFYALL ("Account No. ",'');

Common functions (V)67.

COPYFILTER [S]

Copy the filters of a type variable to another record in the same table (copy COPYFILTER

filters only one field)

Clie1.SETFILTER ("No.", '


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Gets the name of a field

SumIndexFields69.

[Ok: =] Record.CALCSUMS (Field1, [Field2] ,...)

Returns the sum for one (or more) SumIndexField.

Must be on a key that has defined the field.

There should be filters in fields outside the key.

If the above conditions are met, it returns FALSE (or throws an error message).

MovCli.SETCURRENTKEY ("Customer No.", "record date");MovCli.SETRANGE ("Customer No.", "AAA 1050");

MovCli.SETRANGE ("Registration Date", 010199D, 123102D)

MovCli.CALCSUMS (Import)

FlowFields70.

[Ok: =] Record.CALCFIELDS (Field1, [Field2] ,...)

The table fields are FlowFields must be recalculated by applying filters.

Cliente.SETRANGE ("Filter dates, 010199D, 123102D)

Cliente.CALCFIELDS (Balance, "Balance Period");

Dialogues71.

Posts:

Asynchronous Message

MESSAGE

MESSAGE ('Message asynchronous information');

ERROR. Causes Rollback.

ERROR ("ERROR: This runs RollBack ');

.FIELDERROR. Displays the Wrong Field

Message + Ok / Cancel

CONFIRM

IF CONFIRM ('want to continue') THEN

Code> to SI>

ELSECode> to NO>

Dialogues (II)72.

Posts:

Menu options

STRMENU

STRMENU CASE ('& Insert & Modify, & Delete, & Finish', 4) OF

1: code> to Insertar>

2: code> to Modificar>

3: code> to Borrar>4: code> to Terminar>

Code> for Cancelar> ELSE

END;

Dialogues (and III)73.

Posts:

Dialog type objects

Ventana.OPEN ('# 1 ############################ \' +

'Customer # 2 ############### \' +


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'New Name # 3 ############### \' +

'@ 4@@@@@@@@@@@@@@@@@@@@@@@@@@@@@');

Num: = 0;

Ventana.UPDATE (1, 'Client Table');

Clie.RESET;

('-') THEN IF Clie.FIND

REPEAT

Num: = Num + 1;Ventana.UPDATE (2 Clie.Nombre)

Ventana.INPUT (3, newName);

Ventana.UPDATE (4, ROUND ((Num / Clie.COUNT) * 10000));

Clie.VALIDATE ("Name", newName);

UNTIL Clie.NEXT = 0;

Ventana.CLOSE;

File Access74.

Writing to a file:

NombArch =''THEN IFERROR ('Enter the file name. ")

CLEAR (FicMovCont)

FicMovCont.TEXTMODE: = TRUE;

FicMovCont.WRITEMODE: = TRUE;

FicMovCont.QUERYREPLACE: = TRUE;

FicMovCont.CREATE (NombArch)

FicMovCont.WRITE (

STRSUBSTNO (

'# 1 #################### # 2 ####### # 3 ####### # 4 #',

COMPANYNAME, FechInicConsol, FechFinConsol, FORMAT (TransfPorDia, 0,2)));

FicMovCont.CLOSE;

File Access (II)75.

Read from a file:

NombArch =''THEN IF

ERROR ('Enter the file name. ")

CLEAR (FicMovCont)

FicMovCont.TEXTMODE: = TRUE;

FicMovCont.OPEN (NombArch)

WHILE FicMovCont.POS FicMovCont.LEN DO BEGIN

FicMovCont.READ (LinTexto)CodEmpr. "Name": = DELCHR (COPYSTR (LinTexto, 1.30 ),'>');

EVALUATE (FechInicConsol, COPYSTR (LinTexto, 32.9));

EVALUATE (FechFinConsol, COPYSTR (LinTexto, 42.9));

EVALUATE (TransfPorDia, COPYSTR (LinTexto, 52.3));

END;

FicMovCont.CLOSE;

Global Constants System76.

USERID.ID of the user who logged


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Str: = USERID;

COMPANYNAME.Returns the current company

Str: = COMPANYNAME;

OSVersion. Returns a string indicating the current operating system

Str: = OSVersion;

WORKDATE.Returns the current working date

TFecha: = WORKDATE;

TODAY.Returns the date of the operating system

Date: = TODAY;TIME. Returns the operating system time

Time: = TIME;

String Functions77.

Strpos

Position of one string within another

COPYSTR

Copy a string to another

Strlen

Size of a String

PADSTR

Add characters to a String

MAXSTRLEN

Maximum size of a string

LOWERCASE / UPPERCASE

Converting to Uppercase / Lowercase

String Functions (II)78.

CONVERTSTR

Replaces a character set other, within a string

DELCHR

Deletes a set of characters within a string

INCSTR

Increases a string numerically

SELECTSTR

Returns a substring within a set of strings separated by commas


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STRCHECKSUM

Calculates a checksum for a string of numbers

Date Functions79.

DATE2DMY

Gets Day, Month or Year from a Date

DATE2DWY

Gets Day, Week or Year from a Date

CALCDATE

Calculates a date based on a start date and a DateFormula

Date Functions (II)80.

NORMALDATE

Converts a date to "Normal Date"

CLOSINGDATE

Converts a Date "Closing Date"

Math Functions81.

ABS

Absolute Value

POWER

Power

ROUND

Rounding

RANDOMIZE

Plant a seed for the random number generator

RANDOM

Gets a random number

Array Functions82.

Arrayl

Returns the number of array elements

COMPRESSARRAY

Eliminates white elements of an array of text


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ELSE

x: = b / (a + b);

WRONG IF (a> b) THEN

a: = 0;

Standard Format (II)90.

Do not use parentheses in function calls without parameters.

WELL RegistrarLnea;

MAL RegistrarLnea ();

IF and THEN go on the same line. ELSE is on a separate line.

WELL IF x = y THEN

x: = x + 1

ELSE

x: =-x - 1;

Standard Format (II I)91.

The additional clauses including an EXIT ELSE should have no part.

WELL IF x y THEN

EXIT (FALSE);

x: = x * 2;

MAL IF x y THEN

EXIT(FALSE)

ELSE

x := x * 2;

Cuando BEGIN sigue a THEN o ELSE , va en su misma lnea

BIEN IF x = y THEN BEGIN

x := x * 2;

a := a - 3;

END;

MAL IF x = y THEN

BEGIN

x := x * 2;

a := a - 3;END;

Formateo estndar (y IV)92.

Expresar las opciones de campos o variables de forma explcita.

BIEN IF Tipo = Tipo::Oferta THEN

MAL IF Tipo = 0 THEN

REPEAT debe ir solo en su lnea y UNTIL debe ir en una lnea acompaado slo de la condicin


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de fin.

BIEN IF x < y THEN BEGIN

REPEAT

x := x + 1;

UNTIL x = y;

b := x;

END;

WHILE y DO van en la misma lnea.

BIEN WHILE z < a DO BEGIN

a := a + 1;

b := b - 1;

END;


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