// randomly returns a string representing one of the six
// Crown and Anchor faces
function
randFace
() {
return
[
"crown"
,
"anchor"
,
"heart"
,
"spade"
,
"club"
,
"diamond"
]
[
rand
(
0
,
5
)];
}
let
funds
=
50
;
// starting conditions
let
round
=
0
;
while
(
funds
>
1
&&
funds
<
100
) {
round
++
;
console.log(
`round
${
round
}
:`
);
console.log(
`\tstarting funds:
${
funds
}
p`
);
// place bets
let
bets
=
{
crown
:
0
,
anchor
:
0
,
heart
:
0
,
spade
:
0
,
club
:
0
,
diamond
:
0
};
let
totalBet
=
rand
(
1
,
funds
);
if
(
totalBet
===
7
) {
totalBet
=
funds
;
bets
.
heart
=
totalBet
;
}
else
{
// distribute total bet
let
remaining
=
totalBet
;
do
{
let
bet
=
rand
(
1
,
remaining
);
let
face
=
randFace
();
bets
[
face
]
=
bets
[
face
]
+
bet
;
remaining
=
remaining
-
bet
;
}
while
(
remaining
>
0
)
}
funds
=
funds
-
totalBet
;
console
.
log
(
'\tbets: '
+
Object
.
keys
(
bets
).
map
(
face
=>
`
${
face
}
:
${
bets
[
face
]
}
pence`
).
join
(
', '
)
+
` (total:
${
totalBet
}
pence)`
);
// roll dice
const
hand
=
[];
for
(
let
roll
=
0
;
roll
<
3
;
roll
++
) {
hand
.
push
(
randFace
());
}
console.log(
`\thand:
${
hand
.
join
(
', '
)
}
`
);
// collect winnings
let
winnings
=
0
;
for
(
let
die
=
0
;
die
<
hand
.
length
;
die
++
) {
let
face
=
hand
[
die
];
if
(
bets
[
face
]
>
0
)
winnings
=
winnings
+
bets
[
face
];
}
funds
=
funds
+
winnings
;
console.log(
`\twinnings:
${
winnings
}
`
);
A Control Flow Primer | 67
