|| — Logical OR operator.
Arithmetic operators perform operations of change-sign (negate), don't-change-sign, logical AND logical OR, add, subtract, multiply and divide. Note that a value or an expression may fall between two of these operators, either of which could take it as its left or right argument, as in
a + b * c.
In such cases three rules apply:
1. * and / bind to their neighbors more strongly than + and −. Thus the above expression is taken as
a + (b * c)
with * taking b and c and then + taking a and b * c.
2. + and − bind more strongly than &&, which in turn is stronger than ||:
a && b - c || d
is taken as
(a && (b - c)) || d
3. When both operators bind equally strongly, the operations are done left to right:
a - b - c
is taken as
(a - b) - c
Parentheses may be used as above to force particular groupings.
Here is an example of the | operator. It uses the file logicOR.csd.
Example 31. Example of the | operator.
See the sections Real-time Audio and Command Line Flags for more information on using command line flags.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform -odac -+rtmidi=virtual -M0 ;;;realtime audio out and virtual midi keyboard ;-iadc ;;;uncomment -iadc if realtime audio input is needed too </CsOptions> <CsInstruments> ;after a UDO from Rory Walsh sr = 44100 ksmps = 32 nchnls = 2 instr 1 ;displays notes, midi channel and control number information kstatus, kchan, kdata1, kdata2 midiin k1 changed kstatus k2 changed kchan k3 changed kdata1 k4 changed kdata2 if((k1==1)||(k2==1)||(k3==1)||(k4==1)) then printks "Value:%d ChanNo:%d CtrlNo:%d\n" , 0, kdata2, kchan, kdata1 endif endin </CsInstruments> <CsScore> i1 0 60 ;print values for 60 seconds e </CsScore> </CsoundSynthesizer>
Its output should include a line like these:
Value:127 ChanNo:11 CtrlNo:62 Value:127 ChanNo:11 CtrlNo:60 Value:127 ChanNo:11 CtrlNo:60 Value:127 ChanNo:11 CtrlNo:60 Value:127 ChanNo:11 CtrlNo:60 .... Value:0 ChanNo:11 CtrlNo:62 Value:0 ChanNo:11 CtrlNo:62 Value:0 ChanNo:11 CtrlNo:62 Value:0 ChanNo:11 CtrlNo:62 .... Value:77 ChanNo:11 CtrlNo:23 Value:77 ChanNo:11 CtrlNo:23 Value:76 ChanNo:11 CtrlNo:23 Value:76 ChanNo:11 CtrlNo:23 ....