CONST/de - Revision history

Stefanhamburg: /* Beispiel */

2013-02-26T23:54:29Z

Beispiel

Stefanhamburg: /* Example */

2013-02-26T23:53:32Z

Example

Stefanhamburg: /* See also */

2013-02-26T23:48:40Z

Stefanhamburg: /* Anmerkungen */

2013-02-26T23:48:20Z

Anmerkungen

Stefanhamburg: /* Remarks */

2013-02-26T23:42:51Z

Remarks

Stefanhamburg: /* (COPIED FROM ENGLISH PAGE) = */

2013-02-26T23:34:37Z

(**COPIED FROM ENGLISH PAGE**) =

Admin: 1 revision

2013-02-15T19:13:56Z

1 revision

Admin: Created page with "= Action = Declares a symbolic constant. =
2013-02-08T13:07:07Z

Created page with "= Action = Declares a symbolic constant. = <s..."

New page
== (COPIED FROM ENGLISH PAGE) === Action =

Declares a symbolic constant.

 

 

= Syntax =

CONST symbol = numconst

CONST symbol = stringconst

CONST symbol = expression

 

 

= Remarks =
<div style="padding: 0px; margin: 0px 0px 0px 4px;">
{| width="567" cellspacing="0" cellpadding="1" border="1" style="border: 2px solid rgb(0, 0, 0); border-spacing: 0px; border-collapse: collapse;"
|- style="vertical-align: top;"
| valign="top" width="24%" style="width: 132px; border: 1px solid rgb(0, 0, 0);" |
Symbol

| valign="top" width="100%" style="width: 426px; border: 1px solid rgb(0, 0, 0);" |
The name of the symbol.

|- style="vertical-align: top;"
| valign="top" width="24%" style="width: 132px; border: 1px solid rgb(0, 0, 0);" |
Numconst

| valign="top" width="100%" style="width: 426px; border: 1px solid rgb(0, 0, 0);" |
The numeric value to assign to the symbol.

|- style="vertical-align: top;"
| valign="top" width="24%" style="width: 132px; border: 1px solid rgb(0, 0, 0);" |
Stringconst

| valign="top" width="100%" style="width: 426px; border: 1px solid rgb(0, 0, 0);" |
The string to assign to the symbol

|- style="vertical-align: top;"
| valign="top" width="24%" style="width: 132px; border: 1px solid rgb(0, 0, 0);" |
Expression

| valign="top" width="100%" style="width: 426px; border: 1px solid rgb(0, 0, 0);" |
An expression that returns a value to assign the constant

|}
</div>
 

Assigned constants consume no program memory because they only serve as a reference to the compiler.

The compiler will replace all occurrences of the symbol with the assigned value.

 

You can use a constant to give a value a more meaningful name.

For example : variable = 1

 

                 const optHeaterOn = 1

                 variable = optHeaterOn

 

The source code is better to read when you assign a constant. Even better when the values change later, for example when HeaterOn becomes 2, you only need to replace 1 line of code.

 

 

= See also =

[[ALIAS]]

 

 

= Example =

 <source lang="bascomavr">
'-----------------------------------------------------------------------------------------
'name : const.bas
'copyright : (c) 1995-2005, MCS Electronics
'purpose : demo for constants
'micro : Mega48
'suited for demo : yes
'commercial addon needed : no
'-----------------------------------------------------------------------------------------

$regfile = "m48def.dat" ' specify the used micro
$crystal = 4000000 ' used crystal frequency
$baud = 19200 ' use baud rate
$hwstack = 32 ' default use 32 for the hardware stack
$swstack = 10 ' default use 10 for the SW stack
$framesize = 40 ' default use 40 for the frame space

'dimension some variables
Dim Z As String * 10
Dim B As Byte

'assign some constants
'constants dont use program memory
Const S = "test"
Const A = 5 'declare a as a constant
Const B1 = &B1001

'or use an expression to assign a constant
Const X =(b1 * 3) + 2
Const Ssingle = Sin(1)

Print X
Print Ssingle

B = A
'the same as b = 5

Z = S
'the same as Z = "test"

Print A
Print B1
Print S

'you can use constants with conditional compilation
#if A = 5 ' note there is no then
Print "constant a is 5"
#if S = "test"
Print "nested example"
#else ' else is optional
#endif
#else
#endif
End
</source> {{Languages}}

[[Category:BASCOM Language Reference/de]]

@@ Line 111: / Line 111: @@
 Dim B As Byte
-'Einige Konstranten definieren
+'Einige Konstanten definieren
 'Konstanten benötigen keinen Programmspeicher
 Const S = "test"
@@ Line 127: / Line 127: @@
 B = A
-'Das Gleiche wie b = 5
+'Das Gleiche wie B = 5
 Z = S

@@ Line 80: / Line 80: @@
 <span style="font-family: Arial;">&nbsp;</span>
-= <span class="f_Header">See also</span> =
+= <span class="f_Header">Siehe auch</span> =
 [[ALIAS]]

@@ Line 62: / Line 62: @@
 Man kann eine Konstante verwenden um einem Wert einen sinnvollen Namen zu geben.
-For example&nbsp;: variable = 1
+Beispiel: Zustand = 1
 <span style="font-family: Arial;">&nbsp;</span>
-&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;const optHeaterOn = 1
+&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;const HeizungAn = 1
-&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;variable = optHeaterOn
+&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Zustand = HeizungAn
 <span style="font-family: Arial;">&nbsp;</span>
-Der Programmcode ist besser zu lesen wenn Konstanten verwendet werden. Darüberhinaus muss nur eine Zeile Programmcode geändert werden wenn später zum Beispiel HeaterOn 2 sein soll.
+Der Programmcode ist besser zu lesen wenn Konstanten verwendet werden.
 <span style="font-family: Arial;">&nbsp;</span>

@@ Line 19: / Line 19: @@
 <span style="font-family: Arial;">&nbsp;</span>
-= <span class="f_Header">Remarks</span> =
+= <span class="f_Header">Anmerkungen</span> =
 <div style="padding: 0px; margin: 0px 0px 0px 4px;">
 {| width="567" cellspacing="0" cellpadding="1" border="1" style="border: 2px solid rgb(0, 0, 0); border-spacing: 0px; border-collapse: collapse;"
@@ Line 27: / Line 27: @@
 | valign="top" width="100%" style="width: 426px; border: 1px solid rgb(0, 0, 0);" |
-The name of the symbol.
+Der Name der Konstanten.
 |- style="vertical-align: top;"
@@ Line 34: / Line 34: @@
 | valign="top" width="100%" style="width: 426px; border: 1px solid rgb(0, 0, 0);" |
-The numeric value to assign to the symbol.
+Numerischer Wert für die Konstante.
 |- style="vertical-align: top;"
@@ Line 41: / Line 41: @@
 | valign="top" width="100%" style="width: 426px; border: 1px solid rgb(0, 0, 0);" |
-The string to assign to the symbol
+Zeichenketten-Wert für die Konstante.
 |- style="vertical-align: top;"
@@ Line 48: / Line 48: @@
 | valign="top" width="100%" style="width: 426px; border: 1px solid rgb(0, 0, 0);" |
-An expression that returns a value to assign the constant
+Ein Ausdruck (expression) der einen Wert für die Konstante ergibt.
 |}
@@ Line 54: / Line 54: @@
 <span style="font-family: Arial;">&nbsp;</span>
-Assigned constants consume no program memory because they only serve as a reference to the compiler.
+Konstanten benötigen keinen Programmspeicher weil sie nur als Referenz beim Kompilieren dienen.
-The compiler will replace all occurrences of the symbol with the assigned value.
+Der Compiler ersetzt jedes Auftreten der Konstanten durch den entsprechenden Wert.
 <span style="font-family: Arial;">&nbsp;</span>
-You can use a constant to give a value a more meaningful name.
+Man kann eine Konstante verwenden um einem Wert einen sinnvollen Namen zu geben.
 For example&nbsp;: variable = 1
@@ Line 72: / Line 72: @@
 <span style="font-family: Arial;">&nbsp;</span>
-The source code is better to read when you assign a constant. Even better when the values change later, for example when HeaterOn becomes 2, you only need to replace 1 line of code.
+Der Programmcode ist besser zu lesen wenn Konstanten verwendet werden. Darüberhinaus muss nur eine Zeile Programmcode geändert werden wenn später zum Beispiel HeaterOn 2 sein soll.
 <span style="font-family: Arial;">&nbsp;</span>

@@ Line 1: / Line 1: @@
-== (**COPIED FROM ENGLISH PAGE**) === <span class="f_Header">Action</span> =
+= <span class="f_Header">Funktion</span> =
-Declares a symbolic constant.
+Definiert eine symbolische Konstante.
 <span style="font-family: Arial;">&nbsp;</span>

@@ Line 88: / Line 88: @@
 <span style="font-family: Arial;">&nbsp;</span>
-= <span class="f_Header">Example</span> =
+= <span class="f_Header">Beispiel</span> =
 <br/><source lang="bascomavr">
@@ Line 101: / Line 101: @@
 $regfile = "m48def.dat" ' specify the used micro
-$crystal = 4000000 ' used crystal frequency
+$crystal = 4000000 ' Taktfrequenz
-$baud = 19200 ' use baud rate
+$baud = 19200 ' Baudrate
 $hwstack = 32 ' default use 32 for the hardware stack
 $swstack = 10 ' default use 10 for the SW stack
 $framesize = 40 ' default use 40 for the frame space
-'dimension some variables
+'Einige Variablen DIMensionieren
 Dim Z As String * 10
 Dim B As Byte
-'assign some constants
+'Einige Konstranten definieren
-'constants dont use program memory
+'Konstanten benötigen keinen Programmspeicher
 Const S = "test"
-Const A = 5 'declare a as a constant
+Const A = 5 'A als Konstante mit dem Wert 5 deklarieren
 Const B1 = &B1001
-'or use an expression to assign a constant
+'Ausdrücke an Konstante zuweisen
 Const X =(b1 * 3) + 2
 Const Ssingle = Sin(1)
@@ Line 127: / Line 127: @@
 B = A
-'the same as b = 5
+'Das Gleiche wie b = 5
 Z = S
-'the same as Z = "test"
+'Das Gleiche wie Z = "test"
 Print A
@@ Line 137: / Line 137: @@
-'you can use constants with conditional compilation
+'Man kann Konstante bei bedingter Kompilation verwenden
-#if A = 5 ' note there is no then
+#if A = 5 ' Beachte: Es gibt kein THEN
 Print "constant a is 5"
 #if S = "test"
-  Print "nested example"
+  Print "verschachteltes Beispiel"
-#else ' else is optional
+#else ' ELSE ist optional
 #endif
 #else