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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Numerical-integration/Rust/numerical-integration.rust Normal file
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fn integral<F>(f: F, range: std::ops::Range<f64>, n_steps: u32) -> f64
where F: Fn(f64) -> f64
{
let step_size = (range.end - range.start)/n_steps as f64;
let mut integral = (f(range.start) + f(range.end))/2.;
let mut pos = range.start + step_size;
while pos < range.end {
integral += f(pos);
pos += step_size;
}
integral * step_size
}
fn main() {
println!("{}", integral(|x| x.powi(3), 0.0..1.0, 100));
println!("{}", integral(|x| 1.0/x, 1.0..100.0, 1000));
println!("{}", integral(|x| x, 0.0..5000.0, 5_000_000));
println!("{}", integral(|x| x, 0.0..6000.0, 6_000_000));
}