prog8/compiler/examples/numbergame-novm.p8
Irmen de Jong 4be6a2eeef abs()
2018-12-18 01:43:04 +01:00

78 lines
2.6 KiB
Lua

%import c64utils
%import mathlib
; 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.
~ main {
sub start() {
str name = "????????????????????????????????????????"
str input = "??????????"
ubyte secretnumber = rnd() % 99 + 1 ; random number 1..100
c64.VMCSB |= 2 ; switch lowercase chars
c64scr.print_string("Please introduce yourself: ")
c64scr.input_chars(name)
c64scr.print_string("\n\nHello, ")
c64scr.print_string(name)
c64scr.print_string(".\nLet's play a number guessing game.\nI am thinking of a number from 1 to 100!You'll have to guess it!\n")
for ubyte attempts_left in 10 to 1 step -1 {
; stackptr debugging
; c64scr.print_byte(X)
; c64.CHROUT('\n')
c64scr.print_string("\nYou have ")
c64scr.print_ubyte(attempts_left)
c64scr.print_string(" guess")
if attempts_left>1
c64scr.print_string("es")
c64scr.print_string(" left.\nWhat is your next guess? ")
c64scr.input_chars(input)
ubyte guess = str2ubyte(input)
; debug info
; c64scr.print_string(" > attempts left=")
; c64scr.print_byte(attempts_left)
; c64scr.print_string("\n > secretnumber=")
; c64scr.print_byte(secretnumber)
; c64scr.print_string("\n > input=")
; c64scr.print_string(input)
; c64scr.print_string("\n > guess=")
; c64scr.print_byte(guess)
; c64.CHROUT('\n')
; c64scr.print_byte(X) ; stackptr debugging
; c64.CHROUT('\n')
if guess==secretnumber {
return ending(true)
} else {
c64scr.print_string("\n\nThat is too ")
if guess<secretnumber
c64scr.print_string("low!\n")
else
c64scr.print_string("high!\n")
}
}
return ending(false)
sub ending(success: ubyte) {
if success
c64scr.print_string("\n\nYou guessed it, impressive!\n")
else {
c64scr.print_string("\nToo bad! My number was: ")
c64scr.print_ubyte(secretnumber)
c64scr.print_string(".\n")
}
c64scr.print_string("Thanks for playing, ")
c64scr.print_string(name)
c64scr.print_string(".\n")
}
}
}