MikroElektronika PIC Microcontrollers PIC16 Uživatelský manuál stáhnout pdf (Strana 91)

Comparing variables and constants always produces the correct results regardless

of the operands' type.

if A > B then ...

if A > 47 then ...

if A + B > A ...

First, compiler evaluates the expression on the left. During the run-time, result is

stored in a variable of type that matches the largest data type in the expression. In

this case it is byte, as variables A and B are both bytes.

This is correct if the value does not exceed range 0..255, that is, if A + B is less

then 255.

Let's assume Aa is of word type :

if Aa + B > A ...

First, compiler evaluates the expression on the left. The result value is treated as

type that matches the largest data type in the expression. Since Aa is word and B

is byte, our result will be treated as word type.

This is correct if the value does not exceed range 0..65535, that is, if A + B is less

then 65535.

' if tC is less than zero, tC = -tC :

if tC < 0 then

tC = -tC

end if

' Stay in loop while C is not equal to variable

' compare_match; increment C in every cycle:

while tC <> compare_match

tC = tC + 1

wend

mikroBASIC

- Basic Compiler for Microchip PIC microcontrollers

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MikroElektronika: Development tools - Books - Compilers

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MikroElektronika PIC Microcontrollers PIC16 Uživatelský manuál Strana 91