prog8/examples/comparisons_byte.p8
2020-03-23 00:13:46 +01:00

104 lines
1.7 KiB
Lua

%import c64utils
%zeropage basicsafe
main {
sub start() {
byte v1
byte v2
ubyte cr
c64scr.print("signed byte ")
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
c64scr.print("v1=-20, v2=125\n")
compare()
v1=80
v2=80
c64scr.print("v1 = v2 = 80\n")
compare()
v1=20
v2=-111
c64scr.print("v1=20, v2=-111\n")
compare()
check_eval_stack()
return
sub compare() {
c64scr.print(" == != < > <= >=\n")
if v1==v2
c64scr.print(" Q ")
else
c64scr.print(" . ")
if v1!=v2
c64scr.print(" Q ")
else
c64scr.print(" . ")
if v1<v2
c64scr.print(" Q ")
else
c64scr.print(" . ")
if v1>v2
c64scr.print(" Q ")
else
c64scr.print(" . ")
if v1<=v2
c64scr.print(" Q ")
else
c64scr.print(" . ")
if v1>=v2
c64scr.print(" Q ")
else
c64scr.print(" . ")
c64.CHROUT('\n')
}
}
sub check_eval_stack() {
if X!=255 {
c64scr.print("x=")
c64scr.print_ub(X)
c64scr.print(" error!\n")
}
}
}