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- Other types of arrays
- Procedure: Declaring an array parameter
- Passing an array as parameter to a procedure
- WLanguage functions and arrays
- Array of arrays, associative array, queue, stack, list
- Limits: Elements of an array
- Arrays in the classes
- Agregar el contenido de una estructura a un array de estructuras sin utilizar una variable de la estructura
An array is a structured type that is used to group a set of elements of the same type. Each element of the array can be accessed by its index.
TableauJour is array of strings = ["Lundi", "Mardi", "Mercredi", "Jeudi", "Vendredi"]
TableauJour[2]
TableauValeur is array of int
Add(TableauValeur, 5)
Add(TableauValeur, 10)
Add(TableauValeur, 15)
FOR EACH x OF TableauValeur
...
END
TableauValeur is array <growth=1> of int
TableauValeur[1] = 10
TableauValeur[2] = 20
TableauValeur[3] = 30
FOR EACH x OF TableauValeur
END
TableauValeur is array <growth=N> of int
TableauValeur[1] = 10
TableauValeur[5] = 50
FOR EACH x OF TableauValeur
END
Sintaxis
Declaring an array to an Dimension( syntax 1)
<Array name> is array [<growth>] [ [<Dimension 1>] ] <Type of array elements>
Example:
tabChaîne is array <growth=N> [10] strings
tabEntier is array [5] int
Declaring an array to an Dimension( syntax 2) Ocultar los detalles
<Array name> is array [<growth>] of [<Dimension>] <Type of array elements>
<Array name>: Name of the array variable to declare. <growth>: Optional mode for enlarging the array:- no value (default) or "<growth=0>": the array is not automatically enlarged. For example, a runtime error will occur if the array contains 5 elements and if the program accesses the element 6 or 100.
- "<growth>" or "<growth=1>": the array is automatically enlarged by 1 element. For example, if the array contains 5 elements and if the program accesses the element 6, the array is automatically enlarged to handle the element 6 ; a runtime error will occur if the program accesses the element 100.
- "<growth=N>": the array is automatically enlarged by the number of necessary elements. For example, if the array contains 5 elements and if the program accesses the element 6, the array is automatically enlarged to handle the element 6 ; if the program accesses the element 100, the array is automatically enlarged to handle the element 100. The intermediate elements are initialized with the default value for this type of array elements.
Remark: To enlarge an array with several dimensions, use Dimension. <Dimension>: Optional dimension of the array. This parameter can:- be unspecified or correspond to * or 0: the array is initialized empty.
- correspond to a constant value or to an integer variable: the array is initialized with the specified number of elements. Each element is initialized with the default value of its type.
<Type of array elements>: Type of the elements found in the array. See The different types of WLanguage.
Declaring a multi-dimensional array (10 maximum) - Syntax 1
<Array name> is array of [ [<Dimension 1> [, <Dimension 2>]...[, <Dimension 10>]] ] <Type of array elements>
Example:
tabChaîne est un tableau [10,20] chaînes tabEntier est un tableau [3,5,2] entiers
Declaring a multi-dimensional array (10 maximum) - Syntax 2 Ocultar los detalles
<Array name> is array of [<Dimension 1> [by <Dimension 2>] ... [by <Dimension 10>]] <Type of array elements> OR <Array name> is array of [<Dimension 1> [, <Dimension 2>]... [, <Dimension 10>]] <Type of array elements>
<Array name>: Name of the array variable to declare. <Dimension 1>...<Dimension 10>: Dimension 1 to 10 of the array. The value of the dimension can correspond to:- * or 0: the dimension is initialized with 0 element.
- a constant value or an integer variable: the dimension is initialized with the specified number of elements. Each element is initialized with the default value of its type.
<Type of array elements>: Type of the elements found in the array. See The different types of WLanguage.
Declaring an array parameter Ocultar los detalles
One-dimensional array: <Parameter name> is array of [<Dimension>] <Type of array elements>
Two-dimensional array <Parameter name> is array of <Dimension 1> by <Dimension 2> <Type of array elements>
N-dimensional array <Parameter name> is array of [<Dimension 1> [by <Dimension 2>] ... [ by <Dimension N>]] <Type of array elements>
<Parameter name>: Name of the array parameter to declare. <Dimension n>: <Dimension> may not be specified, it may correspond to * , 0 or to a constant value. <Type of array elements>: Type of the elements found in the array. See The different types of WLanguage. Remark: The elements that make up the array can also be arrays, fixed arrays, associative arrays, queues, stacks or lists.
Referring to an array Ocultar los detalles
Referring to an element in a one-dimensional array: <Array name>[Index1] Referring to an element in a two-dimensional array: <Array name>[Index1, Index2] OR <Array name>[index1][index2] Referring to an element in a n-dimensional array: <Array name>[Index1,...,IndexN] OR <Array name>[Index1]...[IndexN]
<Array name>: Name of the array to use. <Index1>: Index of the element for the 1st dimension. <Index2>: Index of the element for the 2nd dimension. <IndexN>: Index of the element for the Nth dimension (N <= 10). Observaciones Other types of arrays The Array keyword is used to define an array. Other types of "advanced" arrays are available: Procedure: Declaring an array parameter An array can be passed as parameter to a procedure. For example:
PROCEDURE AjouteClient(tabClient is array of * CClient,
sNom is string,
sInfo is string)
c is CClient(sNom, sInfo)
Add(tabClient, c)
Remarks: - The type of the elements found in the array passed as parameter must be the same as the one of the declaration.
- The number of dimensions in the array passed as parameter must be the same as the one of the declaration.
- The number of elements found in each dimension of the array passed as parameter must correspond to the declaration:
- if the number of elements for the dimension is *, no check is performed.
- if the number of elements for the dimension is specified, the number of elements must be identical.
- No check is performed during the compilation: checks are performed at runtime.
Passing an array as parameter to a procedure An array can be passed as parameter to a procedure. To do so, use the following syntax: <Nom de la procédure>(<Nom du tableau>) For example:
TableauFourn is array of 10 by 50 strings
AfficheTableau(TableauFourn)
WLanguage functions and arrays Several WLanguage functions can be used to handle the arrays. You have the ability to perform sorts, searches, etc. For more details, see Array functions. Arrays in the classes When copying instances of classes, all the members of the class are copied into the new instance except for the arrays. Therefore, if the value of an array member is modified, this value is modified in all the instances. To get independent arrays in all instances of classes, a local array must be declared as follows:
ClasseSystème is Class
tTableauDéfaut is array local of 1 int
END
Agregar el contenido de una estructura a un array de estructuras sin utilizar una variable de la estructura Si utiliza un array de estructuras con pocos miembros, puede ser más fácil agregar directamente una estructura utilizando el operador [ ] (corchetes). Por ejemplo, para la siguiente estructura: // Structure to store a letter and its ASCII code STKey is Structure sKey is string nAsciiCode is int END // Array of structures arrKeys is array of STKey
En la mayoría de los casos, el contenido se agrega utilizando una variable de un tipo declarado en la estructura: // Temporary structure for the addition stAKey is STKey // Stores the letter A stAKey.sKey = "A" stAKey.nAsciiCode = Asc("A") arrKeys.Add(stAKey)
Con el operador [ ], se obtiene una mejor legibilidad:
// Stores the letter A arrKeys.Add(["A", Asc("A")])
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