Campbell CR6 Series, Operator'S Manual

Page: 195 / 690

Section 7. Installation
195
can simply be condensed to
Public TempC(4).
This statement creates in memory the four variables TempC(1) , TempC(2) ,
TempC(3) , and TempC(4) .
A variable array is useful in program operations that affect many variables in the
same way. CRBasic example
Using a Variable Array in Calculations
(p. 195)
shows compact code that converts four temperatures (°C) to °F.
In this example, a For/Next structure with an incrementing variable is used to
specify which elements of the array will have the logical operation applied to
them. The CRBasic For/Next function will only operate on array elements that
are clearly specified and ignore the rest. If an array element is not specifically
referenced, as is the case in the declaration
Dim TempC()
CRBasic references only the first element of the array, TempC(1) .
See CRBasic example
Concatenation of Numbers and Strings
(p. 381)
for an
example of using the += assignment operator when working with arrays.
Using a Variable Array in Calculations
'This program example demonstrates the use of a variable array to reduce code. In this
'example, two variable arrays are used to convert four temperature measurements from
'degree C to degrees F.
Public TempC(4)
Public TempF(4)
Dim T
BeginProg
Scan (1,Sec,0,0)
Therm107 (TempC(1),1,U1,U11,0,15000,1.0,0)
Therm107 (TempC(2),1,U2,U11,0,15000,1.0,0)
Therm107 (TempC(3),1,U3,U11,0,15000,1.0,0)
Therm107 (TempC(4),1,U4,U11,0,15000,1.0,0)
For T = 1 To 4
TempF(T) = TempC(T) * 1.8 + 32
Next T
NextScan
EndProg
7.6.3.5.1 Advanced Array Declaration
This section describes syntax that facilitates array filling, scaling, copying, etc.
The main applications are as follows:
a) initiating an array