Modd
Syntax
Assignment Variable = Modd (pVariable, pWhole)
Overview
Split a 64-bit floating point value into fractional and whole parts.
Parameters
pVariable can be a floating point constant, variable or expression that will be split. pWhole must be a 64-bit floating point variable that will hold the whole part of the split value. Assignment Variable can be any valid variable type.
Example
Device = 24FJ64GA002 ' Select the device to compile for
Declare Xtal = 16 ' Tell the compiler the device will be operating at 16MHz
Declare Hserial_Baud = 9600 ' USART1 Baud rate
Declare Hrsout1_Pin = PORTB.14 ' Select the pin for TX with USART1
Dim MyDouble as Double
Dim fWhole as Double ' Holds the whole part of the value
Dim fFraction as Double ' Holds the fractional part of the value
Dim MyDword as Dword
RPOR7 = 3 ' Make PPS Pin RP14 U1TX
MyDouble = 3.14
fFraction = Modd(MyDouble, fWhole) ' Split the value
MyDword = fWhole ' Convert the whole part to an integer
HrsoutLn "Whole = ", Dec MyDword
HrsoutLn "Fraction = ", Dec fFractionNotes.
The compiler uses the stack as temporary storage when performing 64-bit floating point library routines, therefore, it may be required to increase the stack size from the default 120 words to 200 words using the Stack_Size declare. If the program resets with a stack underflow/overflow exception when running, the stack size is insufficient and requires increasing.
When implementing trigonometry, or other built in, functions within an expression, always wrap them in parenthesis, otherwise the parser may consider the extra operands as part of the trigonometry parameter and produce an incorrect result. For example:
MyAssignment = (Modd(MyVar1)) + MyVar2