HP VXI 75000 C Series, Руководство пользователя и программирования SCPI

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Algorithm Language Reference 149 Chapter 5
Note that in BASIC the boolean_expression is delimited by the IF and the
THEN keywords. In ’C’ the parentheses delimit the expression. In ’C’ , the
")" is the implied THEN. In BASIC the END IF keyword terminates a
multi-line IF. In ’C’, the if is terminated at the end of the following statement
when no else clause is present, or at the end of the statement following the
else clause. Figure 5-2 shows examples of these forms:
Simplest form (used often)
Two-line form (not recommended; use
multiple line form instead)
Multiple line form (used often)
Multiple line form with else (used often)
Comments
if( boolean_expression ) statement ;
if(
boolean_expression
)
statement ;
if(
boolean_expression
){
statement;
statement;
statement;
}
if( boolean_expression )
{
statement;
statement;
}
else
{
statement ;
}
’C’ Syntax
Figure 5-1. The if Statement ’C’ versus BASIC
IF
boolean_expression
THEN
statement
IF boolean_expression THEN
statement
END IF
IF boolean_expression THEN
statement
statement
statement
END IF
IF
boolean_expression
THEN
statement
statement
ELSE
statement
END IF
BASIC Syntax
if(a <= 0) c=abs(a);
if(a != 0)
c = b / a;
if((a != b) && (a != c))
{
a = a * b;
b = b + 1;
c = 0;
}
if((a == 5) || (b == -5))
{
c = abs(c);
c = 2 / c;
}
else
{
c = a * b;
}
IF A<=0 THEN C=ABS(A)
IF A<>0 THEN
C=B/A
END IF
IF A<>B AND A<>C THEN
A=A*B
B=B+1
C=0
END IF
IF A=5 OR B=-5 THEN
C=ABS(C)
C= 2/C
ELSE
C= A*B
END IF
Examples BASIC Syntax ’C’ Syntax
Figure 5-2. Examples of ’C’ and BASIC if Statements