VXi VT1422A 사용자 설명서

Many of the operation symbols are the same and are used the same way as 
those in BASIC. However, there are differences and they can cause 
programming errors until the differences become familiar.

The arithmetic operators available to the VT1422A are the same as those 
equivalents in BASIC:
+

(addition)

-

(subtraction)

*

(multiplication)

/

(division)

Again same as BASIC:
-

(unary minus)

Examples:

a = b + (-c)

+

(unary plus)

a = c + (+b)

Here there are some differences.

  =

(is equal to)

==

Different (hard to remember)

<> or #

(is not equal to)

!=

Different but obvious

 >

(is greater than)

>

Same

 <

(is less than)

>

Same

 >=

(is greater than or equal to)

>=

Same

 <=

(is less than or equal to)

<=

Same

A common 'C' programming error for BASIC programmers is to 
inadvertently use the assignment operator "=" instead of the comparison 
operator "==" in an if statement. Fortunately, the VT1422A will flag this as 
a Syntax Error when the algorithm is loaded.

There are three operators. They are very different from those in BASIC.

AND

IF A=B AND B=C

&&   

if( ( a == b )&&( b == c ) )

OR

IF A=B OR A=C

| |

if( ( a == b ) | | ( a == c ) )

NOT

IF NOT B

!

if ( ! b )

The VT1422A Algorithm Language provides the if - else construct for 
conditional execution. The following figure compares the elements of the 'C' 
if - else construct with the BASIC if - then - else - end if construct. 
The general form of the if - else construct is:

if(expression) statement1 else  statement2

where statement1 is executed if expression evaluates to non-zero (true), 
and statement2 is executed if expression evaluates to zero (false). 
Statement1 and/or statement2 can be compound statements. That is, 
multiple simple statements within curly braces (see Figure 6-5).