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Added boolean picker / coin flipper example.

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Ron Hale-Evans 2016-06-06 14:49:36 -07:00
parent 3633d39f57
commit e621252f3b
1 changed files with 89 additions and 7 deletions
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docs/getting-started.md
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@ -195,7 +195,7 @@ metal stripe at the bottom of the micro:bit board.) For example, hold
the ``GND`` button with one hand and touch the ``0`` pin (called the ``GND`` button with one hand and touch the ``0`` pin (called
``P0``) with your other hand to tell the micro:bit you're pressing it. ``P0``) with your other hand to tell the micro:bit you're pressing it.
Unscramble the blocks in the editor to show a heart when you press Unscramble the blocks in the editor to show a heart when you touch
pin ``P0``. pin ``P0``.
```shuffle ```shuffle
@ -212,19 +212,101 @@ Click **Compile** to move your program to the BBC micro:bit!
## ~hint ## ~hint
Try this experiment: find a friend and hold hands together. Press the ``GND`` button Try this experiment: find a friend and hold hands. Touch the ``GND``
while your friend pressed the ``P0`` button. You should see the heart! The electric current is going through your bodies and accross your handshake pin while your friend presses the ``P0`` pin. You should see the
to make it happen! heart! The electric current is going through your bodies and across
your handshake to make it happen!
## ~ ## ~
## The amazing coin flipper
### ~avatar avatar
Are you trying to choose whether to play soccer or go to the movies
instead, or which toppings to have on your pizza? Build a coin
flipping machine with the BBC micro:bit to choose for you!
### ~
Here are the blocks to make your coin flipper. When you press button
`B`, the coin flipper will show either `H` for heads or `T` for tails
on the LED screen.
```blocks
basic.forever(() => {
input.onButtonPressed(Button.B, () => {
if (Math.randomBoolean()) {
basic.showString("H");
} else {
basic.showString("T");
}
});
});
```
### ~hint
The ``pick random true or false`` block randomly tells the ``if``
block `true` or `false`. If the ``pick`` block
picked `true`, the ``if`` block shows the letter `H`. Otherwise, it
shows the letter `T`.
That's it!
### ~
### Keeping score
#### ~avatar
To keep track out of how many guesses you've won,
add these blocks to your coin flipper:
#### ~
```blocks
input.onButtonPressed(Button.A, () => {
game.addScore(1);
});
input.onButtonPressed(Button.AB, () => {
basic.showNumber(game.score());
});
```
These blocks mean that if you press button `A`, you will add `1` to
your score, and if you press `A` and `B` together, the micro:bit will
show your score.
When you're done, your coin flipping program should look like this:
```blocks
basic.forever(() => {
input.onButtonPressed(Button.B, () => {
if (Math.randomBoolean()) {
basic.showString("H");
} else {
basic.showString("T");
}
});
input.onButtonPressed(Button.A, () => {
game.addScore(1);
});
input.onButtonPressed(Button.AB, () => {
basic.showNumber(game.score());
});
});
```
Flip until your thumbs get tired!
## Let's play Rock Paper Scissors! ## Let's play Rock Paper Scissors!
### ~avatar avatar ### ~avatar avatar
Build a Rock Paper Scissors game with the BBC micro:bit! Build a Rock Paper Scissors game with the BBC micro:bit! You can play
You can play the game with a friend who has it on a micro:bit. the game with a friend who has it on a micro:bit. You can also play
You can also play it with friends who are just using their hands. it with friends who are just using their hands. (The game is built
like a coin flipper, but with three choices instead of two.)
### ~ ### ~