Added boolean picker / coin flipper example.

This commit is contained in:
Ron Hale-Evans 2016-06-06 14:49:36 -07:00
parent 3633d39f57
commit e621252f3b

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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
``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``.
```shuffle
@ -212,19 +212,101 @@ Click **Compile** to move your program to the BBC micro:bit!
## ~hint
Try this experiment: find a friend and hold hands together. Press the ``GND`` button
while your friend pressed the ``P0`` button. You should see the heart! The electric current is going through your bodies and accross your handshake
to make it happen!
Try this experiment: find a friend and hold hands. Touch the ``GND``
pin while your friend presses the ``P0`` pin. You should see the
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!
### ~avatar avatar
Build a Rock Paper Scissors game with the BBC micro:bit!
You can play the game with a friend who has it on a micro:bit.
You can also play it with friends who are just using their hands.
Build a Rock Paper Scissors game with the BBC micro:bit! You can play
the game with a friend who has it on a micro:bit. You can also play
it with friends who are just using their hands. (The game is built
like a coin flipper, but with three choices instead of two.)
### ~