Crestron SIMPL+ Especificações descarregar pdf (Página 27)

Crestron SIMPL+



Software

Expressions

As reading through the later parts of this guide, as well as the latest revision of the

SIMPL+ Language Reference Guide (Doc. 5797), the term expression is mentioned

in many places. For example, in describing the syntax of the if-else construct, it may

be described as the following:

if (expression1)

{

// code to execute

}

else if (expression2)

{

// code the execute

}

In the above example, expression1 and expression2 can be any valid SIMPL+

expression. This section describes what is and what is not an expression.

An expression in SIMPL+ is anything that consists of operators and operands.

Operators were discussed previously in this section, and operands are simply the

things on which operators act. For example, refer to the following simple expression.

x + 5

In this expression the operator is the addition operator (+), and the operands are x

and 5. Expressions can contain constants, variables, and function calls in addition to

operators. One expression may be made up of many smaller expressions. The

following are all valid SIMPL+ expressions.

max(x,15)

y * x << z

a = 3

(26 + byte(aString,i) mod z = 25

Expressions can range from the very simple to the very complex. Also note that the

last two expressions contained an equal sign. It is very important to recognize that

this operator can have two different meanings based upon where it is used. In the

first example above, the equal sign can serve as an assignment operator (assign the

value 3 to the variable a) or as an equivalency comparison operator (does the

variable a equal 3?). However, an expression cannot contain an assignment (it would

then become a statement, discussed in “Statements” on page 24), so it is indeed

recognized as a comparison operation. In the second case, the equal sign also serves

as a equivalency comparison operator. Here there is no ambiguity since a value

cannot be assigned into an expression (as opposed to a variable).

Expressions always evaluate to either an integer or a string. Refer to the following

example.

x + 5 // this evaluates to an integer

chr(i) + myString // evaluates to a string

a = 3 // evaluates to 1 if true, 0 if false

b < c // evaluates to 1 if true, 0 if false

The last two expressions are comparisons. Comparison operations always result in a

true or false value. In SIMPL+, true expressions result in a value of 1 and false

expressions result in a value of 0. Understanding this concept is key to performing

decision making in SIMPL+. In reality, any expression that evaluates to a non-zero

value is considered TRUE. This concept is discussed in “Controlling Program Flow:

Programming Guide – DOC. 5789A SIMPL+



• 23

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 59 60

Comentários a estes Manuais

Sem comentários

Da lite 84400LS Scheda Tecnica (2 pagine)

Marchio: Da-lite | Categoria: Projection screens | Dimensione: 0.27 MB |

Indice

Tensioned Advantage

Electrol

Method One Method Two

Più prodotti e manuali per Schermi per proiezioni Da-Lite

Modelli	Tipo di Documento
84762	Scheda Tecnica Da-Lite Ascender Electrol, 2 pagine
84816	Scheda Tecnica Da-Lite Fast-Fold, 6 pagine
38837	Scheda Tecnica Da-Lite 38837 projection screen, 2 pagine
70280	Scheda Tecnica Da-Lite Large Cosmopolitan Electrol, 2 pagine
25943	Scheda Tecnica Da-Lite 25943 projection screen, 1 pagine
89897	Scheda Tecnica Da-Lite Tensioned Cosmopolitan Electrol, 5 pagine
92601	Scheda Tecnica Da-Lite Advantage Deluxe Electrol, 2 pagine
90611	Scheda Tecnica Da-Lite Versatol, 1 pagine
37566LS	Scheda Tecnica Da-Lite Contour Electrol, 3 pagine
95746K	Scheda Tecnica Da-Lite Heavy Duty Fast-Fold Deluxe Screen System, 2 pagine
Cosmopolitan Electrol	Scheda Tecnica Da-Lite 79013LS projection screen, 2 pagine
23971	Scheda Tecnica Da-Lite IDEA Thin, 2 pagine
89722	Scheda Tecnica Da-Lite Designer Contour Electrol, 2 pagine
24123	Scheda Tecnica Da-Lite IDEA Magnetic, 2 pagine
75599S	Scheda Tecnica Da-Lite 75599S projection screen, 2 pagine
34238	Scheda Tecnica Da-Lite Heavy Duty Deluxe, 6 pagine
20951	Scheda Tecnica Da-Lite Tensioned Conference Electrol, 2 pagine
20985	Scheda Tecnica Da-Lite Tensioned Conference Electrol, 2 pagine
39717V	Scheda Tecnica Da-Lite Da-Snap, 13 pagine
23663	Scheda Tecnica Da-Lite UTB Contour, 2 pagine

Crestron SIMPL+ Especificações Página 27

Comentários a estes Manuais

Da-Lite 84400LS manuali

Da lite 84400LS Scheda Tecnica (2 pagine)

Indice

Più prodotti e manuali per Schermi per proiezioni Da-Lite

Crestron SIMPL+ Especificações Página 27

Comentários a estes Manuais

Manuais e produtos relacionados com Software Crestron SIMPL+

Da-Lite 84400LS manuali

Da lite 84400LS Scheda Tecnica (2 pagine)

Indice

Più prodotti e manuali per Schermi per proiezioni Da-Lite