play.rs

play.rs

use std::iter::FromIterator;

fn main() {
    let columns_number: i64 = 356;
    
    println!("Number of columns_number: {}", columns_number);
    
    let mut columns_array: Vec<String> = Vec::new();
    let mut last_column: Vec<char> = Vec::new();
    
    let mut i = 0;
    
    loop {
        if last_column.len() == 0 {
            last_column.push('A');
            columns_array.push("A".to_string());

            continue;
        }

        let mut need_plus_up = true;

        for column in last_column.iter_mut().rev() {
            if need_plus_up {
                if *column as u8 == 'Z' as u8 {
                    *column = 'A';
                } else {
                    *column = (1 + *column as u8) as char;
                    need_plus_up = false;
                }
            }
        }

        if need_plus_up {
            last_column.insert(0, 'A');
        }

        columns_array.push(String::from_iter(last_column.clone()));

        i = i+1;

        if i == columns_number-1 {
            break;
        }
    }

    for column in columns_array {
        println!("{}", column);
    }
}