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For ERP LN feature pack upgrade, what method of install are you using?
Installation Wizard into existing VRC
38%
Installation Wizard into new VRC
41%
Manual into existing VRC
3%
Manual into new VRC
19%
Total votes: 37

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NULL characters in strings
By patvdv at 26 Feb 2008 - 21:56


NULL characters in strings

Technically, a string is an array of characters. The internal representation of a string has a NULL character [] at the end. The NULL character represents the character with the value zero.

Null characters can occur within strings after use of the following functions:

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External variables
By patvdv at 26 Feb 2008 - 21:56

External variables

An external variable is declared outside the function blocks. You can use them in all functions that occur after the variable declaration, and also in other programs (for example, forms, reports, and runtime expressions). It is possible to declare external variables within a function block but this is not recommended.
If a local variable has the same name as an external variable, the local variable is used within the function. The external variable is not affected.

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Numeric constants
By patvdv at 26 Feb 2008 - 21:56


Numeric constants

The Baan 3GL programming language supports long and floating point constants. Both types can be preceded by a '+' or a '-' sign.

Long constants

A long constant consists of the digits 0-9 only. For example:

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Fixed and based variables
By patvdv at 26 Feb 2008 - 21:56

Fixed and based variables

Fixed variables

A string variable can be declared as fixed so that its current length always equals the maximum length. For example:

STRING name(10) FIXED
name = "andrew" | the string is always filled up with spaces

The keyword FIXED is applicable to one-dimensional strings only. Multi-dimensional string arrays are always fixed and do not need to be declared with the keyword FIXED.

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Object identifications (preprocessor)
By patvdv at 26 Feb 2008 - 21:56

Object identifications (preprocessor)

The compiler always places a default identification in an object, but you can include you own if you wish. You can use the UNIX command what to write all object lines that begin with '@(#)' on standard output.
The default identification has the following content:

#ident "@(#)<source name>, YY/MM/DD, [HH/MM], From ${logname}"

To set you own identification use the following statement:

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Function arguments
By patvdv at 26 Feb 2008 - 21:56

Function arguments

The arguments of a function are the variables declared in the function header. Arguments can be accessed only within the function.

Declaration, initialization, and scope

Point of declaration

In the function between the brackets { }.

Syntax of declaration

[ref|reference] <type> name

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Operator precedence
By patvdv at 26 Feb 2008 - 21:56

Operator precedence

An expression can include a number of operators, variables, and constants. The overall result is calculated in accordance with the rules of precedence described here. For example, because multiplication has precedence over addition, the result of the expression (3 + 4 * 5) is 23 and not 35.

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Function calls
By patvdv at 26 Feb 2008 - 21:56

Function calls

The call of a function must have the same number of arguments as declared in the function header. Value arguments can be called using a constant or a variable; reference arguments can only be called using a variable. If the called function is not of type void, the function call must be assigned to a variable or used as value argument in another function call.

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3GL programming language features: overview
By patvdv at 26 Feb 2008 - 21:56

3GL programming language features: overview

This section describes the features of the Baan 3GL programming language. You can use the 3GL language in both 3GL scripts and 4GL scripts.

5
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Function prototypes
By patvdv at 26 Feb 2008 - 21:56

Function prototypes

A function consists of three parts:

  • Function prototype
  • Function definition (function block)
  • Function call

The function prototype must be exactly the same as the function header in the function definition. The prototype of a function is not always necessary. For example, it is not necessary in the following situations:

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