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https://github.com/irmen/prog8.git
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78 lines
2.4 KiB
Lua
78 lines
2.4 KiB
Lua
%import c64utils
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%import c64flt
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; The classic number guessing game.
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; This version uses more low-level subroutines (calls directly into the C64's ROM routines)
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; and instead of a loop (with the added behind the scenes processing), uses absolute jumps.
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; It's less readable I think, but produces a smaller program.
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~ main {
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sub start() {
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str name = "????????????????????????????????????????"
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str input = "??????????"
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ubyte guess
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ubyte secretnumber = 0
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ubyte attempts_left = 10
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memory uword freadstr_arg = $22 ; argument for FREADSTR ($22/$23)
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; greeting
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c64.VMCSB |= 2 ; switch lowercase chars
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c64.STROUT("Please introduce yourself: ")
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c64scr.input_chars(name)
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c64.CHROUT('\n')
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c64.CHROUT('\n')
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c64.STROUT("Hello, ")
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c64.STROUT(name)
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c64.STROUT(".\nLet's play a number guessing game.\nI am thinking of a number from 1 to 100!You'll have to guess it!\n")
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; create a secret random number from 1-100
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c64flt.RND() ; fac = random number between 0 and 1
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c64flt.MUL10() ; fac *= 10
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c64flt.MUL10() ; .. and now *100
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c64flt.FADDH() ; add 0.5..
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c64flt.FADDH() ; and again, so +1 total
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A, Y = c64flt.GETADRAY()
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secretnumber = A ; secret number = rnd()*100+1
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ask_guess:
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c64.STROUT("\nYou have ")
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c64scr.print_ub(attempts_left)
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c64.STROUT(" guess")
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if(attempts_left>1)
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c64.STROUT("es")
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c64.STROUT(" left.\nWhat is your next guess? ")
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Y=c64scr.input_chars(input)
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c64.CHROUT('\n')
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freadstr_arg = input
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c64flt.FREADSTR(Y)
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A, Y = c64flt.GETADRAY()
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guess=A
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if(guess==secretnumber) {
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c64.STROUT("\nThat's my number, impressive!\n")
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goto goodbye
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}
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c64.STROUT("\nThat is too ")
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if(guess < secretnumber)
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c64.STROUT("low!\n")
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else
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c64.STROUT("high!\n")
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attempts_left--
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if_nz goto ask_guess
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; game over.
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c64.STROUT("\nToo bad! It was: ")
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c64scr.print_ub(secretnumber)
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c64.CHROUT('\n')
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goodbye:
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c64.STROUT("\nThanks for playing, ")
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c64.STROUT(name)
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c64.STROUT(".\n")
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return
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}
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}
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