// rgb to hex conversion
fn rgb(r: i32, g: i32, b: i32) -> String {
format!("{:02X}{:02X}{:02X}",
r as f32 as u8,
g as f32 as u8,
b as f32 as u8)
}
fn main() {
let (r, g, b) = (123, 86, 200);
println!("rgb {} {} {} to hex {} ", r, g, b, rgb(r, g, b));
}