32 lines
1.1 KiB
Rust
32 lines
1.1 KiB
Rust
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use std::fs::File;
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use std::io::Read;
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const BUFFER_SIZE: usize = 65536;
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fn main() {
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let all_sums_quantity: i32 = 100_000_000;
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let mut above_200_sums_quantity: i32 = 0;
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let mut f = File::open("random_source").unwrap();
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let mut buffer = [0u8; BUFFER_SIZE];
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let total_cycles: i32 = all_sums_quantity / BUFFER_SIZE as i32;
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for _i in 0..total_cycles {
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f.read_exact(&mut buffer).unwrap();
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for p in buffer.windows(2) {
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if p[0] as u16 + p[1] as u16 > 200 {
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above_200_sums_quantity += 1;
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}
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}
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}
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let probability_of_a: f64 = (above_200_sums_quantity) as f64 / (all_sums_quantity) as f64;
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println!("Кількість експериментів: {all_sums_quantity}");
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println!("Кількість сум двох байтів що більше за 200: {above_200_sums_quantity}");
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println!(
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"Статистична ймовірність того, що сума двох випадкових байтів є більша за 200: {probability_of_a:.10}"
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);
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}
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