Mikroelektronika MIKROE-742 데이터 시트

Literals are tokens representing fixed numeric or character values.

The data type of a constant is deduced by the compiler using such clues as numer-
ic value and format used in the source code.

Integral values can be represented in decimal, hexadecimal, or binary notation.

In decimal notation, numerals are represented as a sequence of digits (without com-
mas, spaces, or dots), with optional prefix + or - operator to indicate the sign. Values
default to positive (6258 is equivalent to +6258).

The dollar-sign prefix (

$

) or the prefix 0x indicates a hexadecimal numeral (for exam-

ple, 

$8F

or 

0x8F

).

The percent-sign prefix (

%

) indicates a binary numeral (for example, 

%01010000

).

Here are some examples:

11    

// decimal literal

$11   

// hex literal, equals decimal 17

0x11  

// hex literal, equals decimal 17

%11   

// binary literal, equals decimal 3

The allowed range of values is imposed by the largest data type in mikroPascal
PRO for AVR – 

longint.

Compiler will report an error if the literal exceeds

2147483647

(

$7FFFFFFF

).

A floating-point value consists of:

- Decimal integer 
- Decimal point 
- Decimal fraction 
- e or E and a signed integer exponent (optional) 

You can omit either the decimal integer or decimal fraction (but not both).

Negative floating constants are taken as positive constants with the unary operator
minus (-) prefixed.

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- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 5