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miniscript-rag-corpus

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The rest of the main loop flips the appropriate set of bits. There is an `if`/`else if` structure for the column (lines 28-40), and another one for the row (lines 41-53). Note that there is one bit that matches the column *and* the row — i.e., the one at the exact coordinates you enter. We don't want to flip that on...
**Challenge:** The code given above gets the job done and exercises some important variations on the `if` statement. But there is another way to do it. Lines 28-53 could be replaced with nine lines, each checking for a particular row and column, like this:
```miniscript
if row == "A" or col == 0 then b0A = 1 - b0A
```
Delete lines 28-53, and replace them with the line above, which handles position A0, and eight similar lines to handle the other eight positions. Verify that the game still works!
## Pig Dice Game
The last game for this chapter is another computer-versus-human game. This one involves rolling dice. On each player's turn, a six-sided die is rolled. If the player rolls a 1, their turn is over and they get no points for that turn. If they roll 2 to 6, they get that many points added to their total for the turn. ...
In either case, play then passes to the other player. The first player to reach the goal (32 points in this version) wins the game.
{width:"50%"}
![](pigDice.svg)
{caption:Pig Dice Game}
```miniscript
// Pig Dice game
human = 0
computer = 0
goal = 32
print "Let's play Pig to " + goal + " points!"
while human < goal and computer < goal
// Human player's turn
print
print "Your turn! (You: " + human + " Me: " + computer + ")"
rollTotal = 0
choice = "R"
while choice != "D"
if choice == "R" then // roll!
wait
roll = ceil(rnd * 6)
if roll == 1 then
print "You roll a 1. No points for you!"
rollTotal = 0
break
end if
rollTotal = rollTotal + roll
print "Your roll: " + roll + ", total: " + rollTotal
end if
choice = input("[R]oll again, or [D]one? ")
choice = choice.upper
end while
human = human + rollTotal
print "You gain " + rollTotal + " points, and now have: " + human
if human >= goal then break
// Computer's turn
print
print "My turn! (You: " + human + " Me: " + computer + ")"
rollTotal = 0
while true
wait
roll = ceil(rnd * 6)
if roll == 1 then
print "I roll a 1. Darn!"
rollTotal = 0
break
end if
rollTotal = rollTotal + roll
print "My roll: " + roll + ", total: " + rollTotal
if rnd * 20 < rollTotal then
print "That's enough for me."
break
end if
print "I'll roll again."
end while
computer = computer + rollTotal
print "I gain " + rollTotal + " points, and now have: " + computer
end while
print
print "Final scores: You: " + human + " Me: " + computer
if human > computer then
print "You win. Well played!"
else
print "I win. Good game!"
end if
```
As usual, there's a main `while` loop here. Within that, we have a section of code for the human player, using another `while` loop to let the player roll as many times as they like until they stop or get a 1. Notice how the `break` statement on line 19 breaks out of this inner loop.
Then we have a similar section of code for the computer player. The AI (artificial intelligence) here is on line 45: the computer decides to stop when `rnd * 20 < rollTotal`. The formula `rnd * 20` picks a random number between 0 and 20. So when the computer's total roll is rather small, it's likely to roll again. ...
Play the game a few times and see how often you can win. It's not easy!
**Challenge:** the rule used on line 45 is certainly not optimal; it always plays the same, regardless of whether it's ahead or behind. A smarter player might play more aggressively when behind, and more conservatively when ahead. Change the code so that it first picks a `target` value, equal to 10 if `computer > hum...
## Troubleshooting
If you got errors or incorrect behavior in any of the programs above, start by comparing your code carefully to what's in the book. Here are some common mistakes to watch out for: