[RUST/COMMON] Xorshift 알고리즘을 사용해 난수 생성하기

icodebroker COMMON 2024-06-18

■ Xorshift 알고리즘을 사용해 난수를 생성하는 방법을 보여준다.

▶ 예제 코드 (RS)


use std::time;

static mut SEED : u32 = 0;

unsafe fn get_random_value(start : u32, end : u32) -> u32
{
    if SEED == 0
    {
        let epoc : time::Duration = time::SystemTime::now().duration_since(time::UNIX_EPOCH).unwrap();

        SEED = epoc.as_millis() as u32;
    }

    SEED ^= SEED << 13;
    SEED ^= SEED >> 17;
    SEED ^= SEED << 5;

    return SEED % (end - start + 1) + start;
}

fn main()
{
    for _ in 0..100
    {
        unsafe
        {
            let random_value : u32 = get_random_value(1, 6);

            println!("{}", random_value);
        }
    }
}

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use std::time;

static mut SEED : u32 = 0;

unsafe fn get_random_value(start : u32, end : u32) -> u32

{

if SEED == 0

{

let epoc : time::Duration = time::SystemTime::now().duration_since(time::UNIX_EPOCH).unwrap();

SEED = epoc.as_millis() as u32;

}

SEED ^= SEED << 13;

SEED ^= SEED >> 17;

SEED ^= SEED << 5;

return SEED % (end - start + 1) + start;

}

fn main()

{

for _ in 0..100

{

unsafe

{

let random_value : u32 = get_random_value(1, 6);

println!("{}", random_value);

}