Mikroelektronika MIKROE-724 データシート

mikroBasic PRO for dsPIC30/33 and PIC24

MikroElektronika

215

Explicit Conversion

Explicit conversion can be executed at any point by inserting type keyword (

byte,  word,  short,  integer, 

longint, 

or

  float

) ahead of the expression to be converted. The expression must be enclosed in parentheses. 

Explicit conversion can be performed only on the operand left of the assignment operator.

Special case is the conversion between signed and unsigned types. Explicit conversion between signed and unsigned 

data does not change binary representation of data — it merely allows copying of source to destination.

For example:

dim a as byte

dim b as short

‘...

b = -1

a = byte(b)  ‘ a is 255, not 1

You can’t execute explicit conversion on the operand left of the assignment operator:

word(b) = a   ‘ Compiler will report an error

Conversions Examples

Here is an example of conversion:

 

program test

typedef TBytePtr as ^byte

dim arr as word[10]

    ptr as TBytePtr

dim a, b, cc as byte

dim dd as word

main:

  a = 241

  b = 128

  cc  = a + b         ‘ equals 113

  cc  = word(a + b)   ‘ equals 113

  dd  = a + b         ‘ equals 369

  ptr = TBytePtr(@arr)

  ptr = ^byte(@arr)