How to make a dynamic number counter so that when you press the up arrow, a number is added and when you press the down arrow, a number is subtracted?
I asked myself that question and proceeded to try to solve that algorithm in my mind first and then in code, here is the result.
Let’s add the keyboard handler k_board
cargo add k_board
Let’s add the program logic:
use k_board::{Keyboard, Keys};
fn main() {
let mut number: i8 = 0;
print_number(&mut number, 0);
for key in Keyboard::new() {
match key {
Keys::Up => print_number(&mut number, 1),
Keys::Down => print_number(&mut number, -1),
Keys::Enter => break,
_ => {}
}
}
}
fn print_number(number: &mut i8, operation: i8) {
std::process::Command::new("clear").status().unwrap();
*number += operation;
println!("{}", number);
}
See you soon love ❤️
