mirror of
https://github.com/coding-horror/basic-computer-games.git
synced 2025-12-25 12:25:10 -08:00
102 lines
3.4 KiB
Lua
102 lines
3.4 KiB
Lua
--- Helper function for tabulating messages.
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local function tab(n) return string.rep(" ", n) end
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--- Generates a multi-line string representing a lightning bolt
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local function bolt()
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local bolt_lines = {}
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for n = 29, 21, -1 do
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table.insert(bolt_lines, tab(n) .. "x x")
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end
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table.insert(bolt_lines, tab(20) .. "x xxx")
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table.insert(bolt_lines, tab(19) .. "x x")
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table.insert(bolt_lines, tab(18) .. "xx x")
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for n = 19, 12, -1 do
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table.insert(bolt_lines, tab(n) .. "x x")
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end
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table.insert(bolt_lines, tab(11) .. "xx")
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table.insert(bolt_lines, tab(10) .. "x")
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table.insert(bolt_lines, tab(9) .. "*\n")
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table.insert(bolt_lines, string.rep("#", 25) .. "\n")
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return table.concat(bolt_lines, "\n")
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end
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--- Print the prompt and read a yes/no answer from stdin.
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local function ask_yes_or_no(prompt)
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io.stdout:write(prompt .. " ")
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local answer = string.lower(io.stdin:read("*l"))
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-- any line starting with a 'y' or 'Y' is considered a 'yes'
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return answer:sub(1, 1) == "y"
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end
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--- Print the prompt and read a valid number from stdin.
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local function ask_number(prompt)
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io.stdout:write(prompt .. " ")
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while true do
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local n = tonumber(io.stdin:read("*l"))
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if n then
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return n
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else
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print("Enter a valid number.")
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end
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end
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end
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--- Explain the solution to persuade the player.
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local function explain_solution()
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local k = ask_number("What was your original number?")
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-- For clarity we kept the same variable names of the original BASIC version
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local f = k + 3
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local g = f / 5
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local h = g * 8
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local i = h / 5 + 5
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local j = i - 1
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print("So you think you're so smart, eh?")
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print("Now watch.")
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print(k .. " plus 3 equals " .. f .. ". This divided by 5 equals " .. g .. ";")
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print("this times 8 equals " .. h .. ". If we divide by 5 and add 5,")
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print("we get " .. i .. ", which, minus 1, equals " .. j .. ".")
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end
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--- Main game function.
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local function chief_game()
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--- Print game introduction and challenge
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print(tab(29) .. "Chief")
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print(tab(14) .. "Creative Computing Morristown, New Jersey\n\n")
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print("I am Chief Numbers Freek, the great math god.")
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if not ask_yes_or_no("Are you ready to take the test you called me out for?") then
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print("Shut up, wise tongue.")
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end
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-- Print how to obtain the end result.
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print(" Take a number and add 3. Divide this number by 5 and")
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print("multiply by 8. Divide by 5 and add the same. Subtract 1.")
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-- Ask the result end and reverse calculate the original number.
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local end_result = ask_number(" What do you have?")
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local original_number = (end_result + 1 - 5) * 5 / 8 * 5 - 3
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-- If it is an integer we do not want to print any zero decimals.
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local int_part, dec_part = math.modf(original_number)
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if dec_part == 0 then original_number = int_part end
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-- If the player challenges the answer, print the explanation.
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if not ask_yes_or_no("I bet your number was " .. original_number .. ". Am I right?") then
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explain_solution()
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-- If the player does not accept the explanation, zap them.
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if not ask_yes_or_no("Now do you believe me?") then
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print("YOU HAVE MADE ME MAD!!!")
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print("THERE MUST BE A GREAT LIGHTNING BOLT!\n\n")
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print(bolt())
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print("I hope you believe me now, for your sake!!")
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end
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end
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end
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--- Run the game.
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chief_game()
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