User manual

198
mikoC PRO for PIC32
MikroElektronika
Floating-point Types
The types oat and double, together with the long double variant, are considered to be oating-point types. The
mikroC PRO for PIC32’s implementation of an ANSI Standard considers all three to be the same type.
Floating point in the mikroC PRO for PIC32 is implemented using the Microchip AN575 32-bit format (IEEE 754
compliant).
An overview of the oating-point types is shown in the table below:
Type Size in bytes Range
oat
4 -1.5 * 10
45
.. +3.4 * 10
38
double
4 -1.5 * 10
45
.. +3.4 * 10
38
long double
4 -1.5 * 10
45
.. +3.4 * 10
38
Enumerations
An enumeration data type is used for representing an abstract, discreet set of values with appropriate symbolic
names.
Enumeration Declaration
Enumeration is declared like this:
enum tag {enumeration-list};
Here, tag is an optional name of the enumeration; enumeration-list is a comma-delimited list of discreet values,
enumerators (or enumeration constants). Each enumerator is assigned a xed integral value. In the absence of explicit
initializers, the rst enumerator is set to zero, and the value of each succeeding enumerator is set to a value of its
predecessor increased by one.
Variables of the enum type are declared the same as variables of any other type. For example, the following
declaration:
enum colors { black, red, green, blue, violet, white } c;
establishes a unique integral type, enum colors, variable c of this type, and set of enumerators with constant integer
values (black = 0, red = 1, ...). In the mikroC PRO for PIC32, a variable of an enumerated type can be assigned any
value of the type int – no type checking beyond that is enforced. That is:
c = red; // OK
c = 1; // Also OK, means the same