prog8/examples/numbergame.p8

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%import c64utils
%import c64lib
%zeropage basicsafe
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; The classic number guessing game.
; This version uses mostly high level subroutine calls and loops.
; It's more readable than the low-level version, but produces a slightly larger program.
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~ main {
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sub start() {
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str name = "????????????????????????????????????????"
str input = "??????????"
ubyte secretnumber = rnd() % 99 + 1 ; random number 1..100
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c64.VMCSB |= 2 ; switch lowercase chars
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c64scr.print("Please introduce yourself: ")
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c64scr.input_chars(name)
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c64scr.print("\n\nHello, ")
c64scr.print(name)
c64scr.print(".\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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for ubyte attempts_left in 10 to 1 step -1 {
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c64scr.print("\nYou have ")
c64scr.print_ub(attempts_left)
c64scr.print(" guess")
if attempts_left>1
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c64scr.print("es")
c64scr.print(" left.\nWhat is your next guess? ")
c64scr.input_chars(input)
ubyte guess = lsb(c64utils.str2uword(input))
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if guess==secretnumber {
return ending(true)
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} else {
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c64scr.print("\n\nThat is too ")
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if guess<secretnumber
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c64scr.print("low!\n")
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else
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c64scr.print("high!\n")
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}
}
return ending(false)
sub ending(ubyte success) {
if success
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c64scr.print("\n\nYou guessed it, impressive!\n")
else {
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c64scr.print("\nToo bad! My number was: ")
c64scr.print_ub(secretnumber)
c64scr.print(".\n")
}
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c64scr.print("Thanks for playing, ")
c64scr.print(name)
c64scr.print(".\n")
}
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}
}