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v/examples/vcasino/vcasino.v

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import rand
import os
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const (
help_text = ' Usage:\t./VCasino\n
Description:\n VCasino is a little game only made to learn V.\n'
g_desc = " The object of Roulette is to pick the number where the spinning ball will land on the wheel.
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If your number is the good one, you'll get your bet x3.
If your number is the same color as the ball one, you'll get your bet /2.
Otherwise, you will lose your bet.\n"
odd = 'red'
even = 'black'
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)
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struct Options {
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long_opt string
short_opt string
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}
fn display_help() {
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println(help_text + g_desc)
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}
fn option_parser() bool {
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help := Options{'--help', '-h'}
for i in 0 .. os.args.len {
if os.args[i] == help.long_opt || os.args[i] == help.short_opt {
display_help()
return true
}
}
return false
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}
fn str_is_nbr(s string) bool {
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for i in 0 .. s.len {
if !s[i].is_digit() {
return false
}
}
return true
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}
fn get_bet_nbr() int {
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mut bet_nbr := -1
for bet_nbr < 0 || bet_nbr > 49 {
println('Reminder: odd numbers are red and even are black.')
println('Type the number you want to bet on (between 0 and 49):')
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line := os.get_line().trim_space()
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if line.len < 1 {
println('error: empty line.')
continue
}
if !str_is_nbr(line) {
println('error: ${line} is not a number.')
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continue
}
bet_nbr = line.int()
if bet_nbr < 0 || bet_nbr > 49 {
println('error: ${line} is not between 0 and 49.')
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bet_nbr = -1
continue
}
}
return bet_nbr
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}
fn get_bet(money int) int {
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mut bet := -1
for bet <= 0 || bet > money {
println('You have ${money} V. Type in the amount of your bet:')
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line := os.get_line().trim_space()
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if line.len < 1 {
println('error: empty line.')
continue
}
if !str_is_nbr(line) {
println('error: ${line} is not a number.')
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continue
}
bet = line.int()
if bet <= 0 {
println('error: ${line} is not higher than 1.')
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continue
} else if bet > money {
println('error: ${line} is more money than you have.')
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}
}
return bet
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}
fn run_wheel(bet_nbr int, _bet int) int {
mut bet := _bet
winning_nbr := rand.intn(50) or { 0 }
print('Roulette Wheel spinning... and stops on the number ${winning_nbr} which is a ')
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if winning_nbr % 2 == 1 {
println(odd)
} else {
println(even)
}
if winning_nbr == bet_nbr {
bet *= 3
println('Congratulations! You get ${bet} V!')
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} else if winning_nbr % 2 == bet_nbr % 2 {
bet /= 2
println('You bet the right color. You get ${bet} V!')
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} else {
println('Sorry buddy. You lost ${bet} V!')
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bet *= -1
}
return bet
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}
fn is_broke(money int) bool {
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if money <= 0 {
println("You're broke, the game is over..")
return false
}
quit := Options{'yes', 'y'}
println('You have ${money} V. Do you want to quit the casino with your winnings? (y/n)')
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line := os.get_line().trim_space().to_lower()
if line == quit.long_opt || line == quit.short_opt {
return false
}
return true
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}
fn game_loop() {
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mut can_play := true
mut money := 1000
println(g_desc)
println('You start the game with ${money} V.\n')
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for can_play {
bet_nbr := get_bet_nbr()
bet := get_bet(money)
money += run_wheel(bet_nbr, bet)
can_play = is_broke(money)
}
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}
fn main() {
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if os.args.len >= 2 && option_parser() {
return
}
game_loop()
}