Teledyne-lecroy USB Script Decode Manual Instrukcja Użytkownika Pobierz pdf (Strona 28)

CHAPTER 7

CATC Scripting Language for USB Statements

if(3-3||2-2)Trace ( "Yes" );

else Trace ( "No" );

will cause “No” to be printed, because 3-3||2-2will evaluate to False

(neither 3-3nor 2-2is nonzero).

while Statements

A while statement is written as

while <expression><statement>

An example of this is

x=2;

while ( x < 5 )

{

Trace ( x, ", " );

x=x+1;

}

The result of this would be

2, 3, 4,

for Statements

A for statement takes the form

for (<expression1>; <expression2>; <expression3>)

The first expression initializes, or sets, the starting value for x. It is executed one

time, before the loop begins. The second expression is a conditional expression. It

determines whether the loop will continue -- if it evaluates true, the function keeps

executing and proceeds to the statement; if it evaluates false, the loop ends. The

third expression is executed after every iteration of the statement.

Figure 7-1: Execution of a for statement

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 89 90

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Teledyne-lecroy USB Script Decode Manual Instrukcja Użytkownika Strona 28