prog8/examples/cmp/comparisons_byte.p8

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%import c64textio
%zeropage basicsafe
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main {
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sub start() {
byte v1
byte v2
ubyte cr
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txt.print("signed byte ")
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cr=v1==v2
cr=v1==v2
cr=v1==v2
cr=v1!=v2
cr=v1!=v2
cr=v1!=v2
cr=v1<v2
cr=v1<v2
cr=v1<v2
cr=v1<v2
cr=v1>v2
cr=v1>v2
cr=v1>v2
cr=v1>v2
cr=v1>v2
cr=v1<=v2
cr=v1<=v2
cr=v1<=v2
cr=v1<=v2
cr=v1>=v2
cr=v1>=v2
cr=v1>=v2
cr=v1>=v2
cr=v1>=v2
; comparisons:
v1=-20
v2=125
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txt.print("v1=-20, v2=125\n")
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compare()
v1=80
v2=80
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txt.print("v1 = v2 = 80\n")
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compare()
v1=20
v2=-111
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txt.print("v1=20, v2=-111\n")
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compare()
return
sub compare() {
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txt.print(" == != < > <= >=\n")
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if v1==v2
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txt.print(" Q ")
else
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txt.print(" . ")
if v1!=v2
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txt.print(" Q ")
else
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txt.print(" . ")
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if v1<v2
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txt.print(" Q ")
else
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txt.print(" . ")
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if v1>v2
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txt.print(" Q ")
else
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txt.print(" . ")
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if v1<=v2
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txt.print(" Q ")
else
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txt.print(" . ")
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if v1>=v2
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txt.print(" Q ")
else
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txt.print(" . ")
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c64.CHROUT('\n')
}
}
}