prog8/examples/animals.p8

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2021-02-24 21:58:16 +00:00
%import textio
%import string
; Animal guessing game where the computer gets smarter every time.
; Note: this program is compatible with C64 and CX16.
main {
const ubyte database_size = 100
uword animal_names_buf
uword questions_buf
uword animal_names_ptr
uword questions_ptr
uword[database_size] animals
uword[database_size] questions
uword[database_size] answers_questions
uword[database_size] answers_animals
ubyte new_animal_number
ubyte new_question_number
str userinput = "x"*80
sub start() {
; initialize the database
animal_names_buf = memory("animalnames", 500)
questions_buf = memory("questions", 2000)
animal_names_ptr = animal_names_buf
questions_ptr = questions_buf
animals[0] = 0
animals[1] = "dolphin"
animals[2] = "eagle"
animals[3] = "horse"
new_animal_number = 4
questions[0] = 0
questions[1] = "does it swim"
questions[2] = "can it fly"
new_question_number = 3
answers_questions[0] = mkword(0, 0)
answers_questions[1] = mkword(0, 2)
answers_questions[2] = mkword(0, 0)
answers_animals[0] = mkword(0, 0)
answers_animals[1] = mkword(1, 0)
answers_animals[2] = mkword(2, 3)
; play the game
game()
}
sub game() {
repeat {
ubyte current_question = 1
txt.print("\n\nanimal guessing game!\nthink of an animal.\n")
ubyte guessed = false
while not guessed {
txt.print(questions[current_question])
txt.print("? ")
if txt.input_chars(userinput) {
txt.nl()
ubyte animal_number
if userinput[0]=='y' {
animal_number = msb(answers_animals[current_question])
if animal_number {
guess(current_question, true, animal_number)
guessed = true
} else {
current_question = msb(answers_questions[current_question])
}
}
else if userinput[0]=='n' {
animal_number = lsb(answers_animals[current_question])
if animal_number {
guess(current_question, false, animal_number)
guessed = true
} else {
current_question = lsb(answers_questions[current_question])
}
}
else {
txt.print("answer (y)es or (n)o please.\n")
}
} else
txt.nl()
}
}
}
sub guess(ubyte question_number, ubyte given_answer_yesno, ubyte animal_number) {
txt.print("is it a ")
txt.print(animals[animal_number])
txt.print("? ")
txt.input_chars(userinput)
if userinput[0] == 'y' {
txt.print("\n\nsee, i knew it!\n")
return
}
str name = "x"*30
txt.print("\n\ni give up. what is it? ")
txt.input_chars(name)
txt.print("\nwhat yes-no question would best articulate the difference\nbetween a ")
txt.print(animals[animal_number])
txt.print(" and a ")
txt.print(name)
txt.print("? ")
txt.input_chars(userinput)
txt.print("\nfor a ")
txt.print(name)
txt.print(", what is the answer to that; yes or no? ")
str answer = "x"*10
txt.input_chars(answer)
animals[new_animal_number] = animal_names_ptr
questions[new_question_number] = questions_ptr
animal_names_ptr += string.copy(name, animal_names_ptr)+1 ; store animal name in buffer
questions_ptr += string.copy(userinput, questions_ptr)+1 ; store question in buffer
answers_questions[new_question_number] = mkword(0, 0)
if answer[0]=='y'
answers_animals[new_question_number] = mkword(new_animal_number, animal_number)
else
answers_animals[new_question_number] = mkword(animal_number, new_animal_number)
uword previous_animals = answers_animals[question_number]
uword previous_questions = answers_questions[question_number]
if given_answer_yesno {
answers_animals[question_number] = mkword(0, lsb(previous_animals))
answers_questions[question_number] = mkword(new_question_number, lsb(previous_questions))
} else {
answers_animals[question_number] = mkword(msb(previous_animals), 0)
answers_questions[question_number] = mkword(msb(previous_questions), new_question_number)
}
new_animal_number++
new_question_number++
txt.print("\n\nthanks, i know more animals now! let's try again.\n")
}
}