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https://github.com/irmen/prog8.git
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106 lines
1.8 KiB
Lua
106 lines
1.8 KiB
Lua
%import c64utils
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%zeropage basicsafe
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main {
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sub start() {
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byte v1
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byte v2
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ubyte cr
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c64scr.print("signed byte ")
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cr=v1==v2
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cr=v1==v2
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cr=v1==v2
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cr=v1!=v2
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cr=v1!=v2
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cr=v1!=v2
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cr=v1<v2
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cr=v1<v2
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cr=v1<v2
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cr=v1<v2
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cr=v1>v2
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cr=v1>v2
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cr=v1>v2
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cr=v1>v2
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cr=v1>v2
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cr=v1<=v2
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cr=v1<=v2
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cr=v1<=v2
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cr=v1<=v2
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cr=v1>=v2
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cr=v1>=v2
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cr=v1>=v2
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cr=v1>=v2
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cr=v1>=v2
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; comparisons:
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v1=-20
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v2=125
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c64scr.print("v1=-20, v2=125\n")
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compare()
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v1=80
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v2=80
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c64scr.print("v1 = v2 = 80\n")
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compare()
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v1=20
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v2=-111
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c64scr.print("v1=20, v2=-111\n")
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compare()
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check_eval_stack()
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return
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sub compare() {
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c64scr.print(" == != < > <= >=\n")
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if v1==v2
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c64scr.print(" Q ")
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else
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c64scr.print(" . ")
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if v1!=v2
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c64scr.print(" Q ")
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else
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c64scr.print(" . ")
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if v1<v2
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c64scr.print(" Q ")
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else
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c64scr.print(" . ")
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if v1>v2
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c64scr.print(" Q ")
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else
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c64scr.print(" . ")
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if v1<=v2
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c64scr.print(" Q ")
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else
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c64scr.print(" . ")
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if v1>=v2
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c64scr.print(" Q ")
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else
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c64scr.print(" . ")
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c64.CHROUT('\n')
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}
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}
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sub check_eval_stack() {
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c64scr.print("stack x=")
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c64scr.print_ub(X)
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if X==255
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c64scr.print(" ok\n")
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else
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c64scr.print(" error!\n")
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}
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}
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