Function type and return value

The type declaration in a function declaration indicates the type of the function. This must be the same as the type of the return value. Functions can be of the following types:

• long
• double
• string
• domain
• void (this means that no value is returned)

If you do not specify a type, the function is of type void by default. In functions of type void, the return statement cannot have any argument. For example

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Preprocessor

The bic6.2 compiler for 3GL program scripts has a built in preprocessor with the following functions:

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Functions

In a program, a function performs a particular task that can be executed many times, with different values. The syntax of a function is as follows (parts between brackets [] are optional):

FUNCTION [ function_type ] function_name( [ arglist ] )
{
declaration of local variables
statement(s)
RETURN[( return_value )]
}

where arglist consists of one or more argument declarations with the following syntax:

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Relational operators

Relational operators compare two operands. If the condition (equal, greater than, less than, and so on) is satisfied, the result becomes TRUE. If not, it becomes FALSE.
Relational operators can be performed on values of every available type, but the operands of one expression must be of the same type. One exception to that rule is that longs can be compared to doubles.

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Global variables

Variables declared outside any function block are global variables. You can use them in all functions that occur after the variable declaration.

Declaration, initialization, and scope

 #include "filename"
 #include <filename>