Denso BHT-200QW Spezifikationen PDF herunterladen (Seite 191)

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101

Chapter 14. Statement Reference

183

Calling a user-defined function

FNfunctionname calls a user-defined function.

• The number of realparameters should be equal to that of dummyparameters, and

the types of the corresponding variables used in those parameters should be identical.

• If you specify a global variable in realparameter when calling a user-defined function,

the user-defined function cannot update the value of the global variable. This is because

all realparameters are passed not by address but by value. (So called

"Call-by-value")

Syntax errors:

Syntax errors:Syntax errors:

Syntax errors:

When creating a user-defined function

Error code and message Meaning

error 59: Incorrect use of DEF

FN... EXIT DEF...END

DEF

• The EXIT DEF statement is specified

outside the function definition block.

• The END DEF statement is specified outside

the function definition block.

error 60: Incomplete control

struc-ture

(DEF FN...END DEF)

END DEF is missing.

error 61: Cannot use DEF FN in

control structure

The DEF FN...END DEF statement is defined

in other block-structured statements such as

FOR and IF statement blocks.

error 64: Function redefinition

You made double definition to a same

function name.

error 71: Syntax error

• functionname is an integer function

name, but generalexpression is a real

type. (If functionname is a real function

name and generalexpression is an

integer type, then no error occurs.)

• stringlength is out of the range.

• stringlength is not an integer constant.

• The function name is assigned a value

outside the function definition block.

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