Mikroelektronika MIKROE-350 Fiche De Données

Conversion of variable of one type to variable of another type is typecasting.
mikroBasic PRO for AVR supports both implicit and explicit conversions for built-in
types.

Compiler will provide an automatic implicit conversion in the following situations:

- statement requires an expression of particular type (according to language 

definition) and we use an expression of different type, 

- operator requires an operand of particular type and we use an operand of 

different type, 

- function requires a formal parameter of particular type and we pass it an object of 

different type, 

- 

result

does not match the declared function return type. 

When operands are of different types, implicit conversion promotes the less com-
plex to the more complex type taking the following steps:

byte/char 



word

short     



integer

short     



longint

integer   



longint

integral  



float

Higher bytes of extended unsigned operand are filled with zeroes. Higher bytes of
extended signed operand are filled with bit sign (if number is negative, fill higher
bytes with one, otherwise with zeroes). For example:

dim a as byte
dim b as word
'...

a = $FF
b = a  ' a is promoted to word, b becomes $00FF

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- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 5