40 lines
966 B
Plaintext
40 lines
966 B
Plaintext
struct SimpleMovingAverage {
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period: usize,
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numbers: Vec<usize>
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}
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impl SimpleMovingAverage {
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fn new(p: usize) -> SimpleMovingAverage {
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SimpleMovingAverage {
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period: p,
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numbers: Vec::new()
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}
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}
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fn add_number(&mut self, number: usize) -> f64 {
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self.numbers.push(number);
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if self.numbers.len() > self.period {
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self.numbers.remove(0);
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}
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if self.numbers.is_empty() {
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return 0f64;
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}else {
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let sum = self.numbers.iter().fold(0, |acc, x| acc+x);
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return sum as f64 / self.numbers.len() as f64;
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}
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}
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}
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fn main() {
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for period in [3, 5].iter() {
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println!("Moving average with period {}", period);
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let mut sma = SimpleMovingAverage::new(*period);
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for i in [1, 2, 3, 4, 5, 5, 4, 3, 2, 1].iter() {
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println!("Number: {} | Average: {}", i, sma.add_number(*i));
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}
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}
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}
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