Реферат: Networking Principles Essay Research Paper DialUp Scripting

- Unary minus

! One’s complement

The binary operators are listed in the following table in their order of precedence. Operators with higher precedence are listed first:

Operators Type of Operation Type Restrictions

* / Multiplicative Integers

+ – Additive integers Strings (+ only)

* * *= *= Relational Integers

== != Equality Integers, strings, booleans

and Logical AND Booleans

or Logical OR Booleans

Examples:

count = 3 + 5 * 40

transmit “Hello” + ” there”

delay 24 / (7 – 1)

6.0 Comments

All text on a line following a semicolon is ignored.

Examples:

; this is a comment

transmit “hello” ; transmit the string “hello”

7.0 Keywords

Keywords specify the structure of the script. Unlike commands, they do not perform an action. The keywords are listed below.

proc name

Indicates the beginning of a procedure. All scripts must have a main procedure (proc main). Script execution starts at the main procedure and terminates at the end of the main procedure.

endproc

Indicates the end of a procedure. When the script is executed to the endproc statement for the main procedure, Dial-Up Networking will start PPP or SLIP.

integer name [ = value ]

Declares a variable of type integer. You can use any numerical expression or variable to initialize the variable.

string name [ = value ]

Declares a variable of type string. You can use any string literal or variable to initialize the variable.