Launch rocket with countdown and acceleration in stdout
The task is to simulate the countdown of a rocket launch from 5 down to 0 seconds and then display the moving, accelerating rocket on the standard output device as a simple ASCII art animation.
- Task Description
Go
...though my rocket is a bit fancier :)
<lang go>package main
import (
"fmt" "time"
)
const rocket = `
/\ ( ) ( ) /|/\|\ /_||||_\
`
func printRocket(above int) {
fmt.Print(rocket)
for i := 1; i <= above; i++ {
fmt.Println(" ||")
}
}
func cls() {
fmt.Print("\x1B[2J")
}
func main() {
// counting
for n := 5; n >= 1; n-- {
cls()
fmt.Printf("%d =>\n", n)
printRocket(0)
time.Sleep(time.Second)
}
// ignition
cls()
fmt.Println("Liftoff !")
printRocket(1)
time.Sleep(time.Second)
// liftoff
ms := time.Duration(1000)
for n := 2; n < 100; n++ {
cls()
printRocket(n)
time.Sleep(ms * time.Millisecond)
if ms >= 40 {
ms -= 40
} else {
ms = 0
}
}
}</lang>
REXX
<lang rexx>/*REXX pgm does a countdown and then display the launching of a rocket (ASCII animation)*/ parse arg cntDown . /*obtain optional argument from the CL.*/ if cntDown== | cntDown=="," then cntDown= 5 /*Not specified? Then use the default.*/
@. = /* [↓] glyphs for the rocket ship. */
@.1= ' /\ '
@.2= ' | | '
@.3= ' | | '
@.4= ' | | '
@.5= ' /|/\|\ '
@.6= '/_||||_\'
do rs=1 while @.rs\== /*determine size of the rocket (height)*/
end /*rs*/
rs= rs - 1 /*the true rocket size (height). */ cls= 'CLS' /*the command used to clear the screen.*/ parse value scrsize() with sd sw . sw= sw - 1 /*usable screen width on some systems. */ sd= sd - 3 /* " " depth " " " */ air= sd - 1 - rs /*"amount" of sky above the rocket. */ say
do j=cntDown by -1 to 1 /* [↓] perform countdown; show rocket.*/
cls /*use this command to clear the screen.*/
say right(j, 9) 'seconds' /*display the amount of seconds to go. */
call sky /*display the sky above the rocket. */
call rocket /*display the rocket (on the ground). */
call delay 1 /*wait one second during the countdown.*/
end /*j*/
say left(,9) "liftoff!" /*announce liftoff of the rocket. */ cls /*use this command to clear the screen.*/ call sky /*display the sky above the rocket. */ call rocket /*display the rocket (in flight). */
do sd+4; say /*"make" the rocket appear to fly. */
call delay .1 /*wait for one-tenth of a second. */
end /*sd+4*/
exit /*stick a fork in it, da rocket is gone*/ /*──────────────────────────────────────────────────────────────────────────────────────*/ sky: do air; say; end /*air*/; return /*display the sky above the rocket. */ rocket: do ship=1 for rs; say left(, sw%2 - 5) @.ship; end /*ship*/; return</lang>
Rust
<lang rust> use std::{thread, time};
fn print_rocket(above: u32) { print!( " oo
oooo oooo oooo
"); for _num in 1..above+1 {
println!(" ||");
} }
fn main() {
// counting
for number in (1..6).rev() {
print!("\x1B[2J");
println!("{} =>", number);
print_rocket(0);
let dur = time::Duration::from_millis(1000);
thread::sleep(dur); }
// ignition
print!("\x1B[2J");
println!("Liftoff !");
print_rocket(1);
let dur = time::Duration::from_millis(1000);
thread::sleep(dur);
// liftoff
let mut dur_time : u64 = 1000;
for number in 2..100 {
print!("\x1B[2J");
print_rocket(number);
let dur = time::Duration::from_millis(dur_time);
thread::sleep(dur);
dur_time -= if dur_time >= 30 {30} else {dur_time};
}
}
</lang>