prog8/examples/comparisons_float.p8

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%import c64utils
%import c64flt
%zeropage basicsafe
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main {
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sub start() {
float v1
float v2
ubyte cr
c64scr.print("floating point ")
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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=666.66
c64scr.print("v1=20, v2=666.66\n")
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compare()
v1=-20
v2=666.66
c64scr.print("v1=-20, v2=666.66\n")
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compare()
v1=666.66
v2=555.55
c64scr.print("v1=666.66, v2=555.55\n")
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compare()
v1=3.1415
v2=-3.1415
c64scr.print("v1 = 3.1415, v2 = -3.1415\n")
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compare()
v1=3.1415
v2=3.1415
c64scr.print("v1 = v2 = 3.1415\n")
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compare()
v1=0
v2=0
c64scr.print("v1 = v2 = 0\n")
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compare()
check_eval_stack()
return
sub compare() {
c64scr.print(" == != < > <= >=\n")
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if v1==v2
c64scr.print(" Q ")
else
c64scr.print(" . ")
if v1!=v2
c64scr.print(" Q ")
else
c64scr.print(" . ")
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if v1<v2
c64scr.print(" Q ")
else
c64scr.print(" . ")
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if v1>v2
c64scr.print(" Q ")
else
c64scr.print(" . ")
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if v1<=v2
c64scr.print(" Q ")
else
c64scr.print(" . ")
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if v1>=v2
c64scr.print(" Q ")
else
c64scr.print(" . ")
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c64.CHROUT('\n')
}
}
sub check_eval_stack() {
c64scr.print("stack x=")
c64scr.print_ub(X)
if X==255
c64scr.print(" ok\n")
else
c64scr.print(" error!\n")
}
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}