finish rust port of 68_orbit

2025-12-30 14:42:03 -08:00 · 2022-05-14 23:39:18 -07:00
parent 9cd4dd33a0
commit bbbf2478ef
4 changed files with 330 additions and 0 deletions
--- a/68_Orbit/rust/src/main.rs
+++ b/68_Orbit/rust/src/main.rs
@@ -0,0 +1,103 @@
+/*
+    The responsibilities that remain in the main function after separating concerns
+    should be limited to the following:
+ - Setting up any configuration
+ - Calling a run function in lib.rs
+ - Handling the error if run returns an error
+*/
+
+use std::process;       //allows for some better error handling
+
+mod lib;
+use lib::Config;
+
+/// main function
+fn main() {
+    //greet user
+    welcome();
+
+    // set up other configuration
+    let mut config = Config::new().unwrap_or_else(|err| {
+        eprintln!("Problem configuring program: {}", err);
+        process::exit(1);
+    });
+
+    // run the program
+    if let Err(e) = lib::run(&mut config) {
+        eprintln!("Application Error: {}", e); //use the eprintln! macro to output to standard error
+        process::exit(1); //exit the program with an error code
+    }
+
+    //end of program
+    println!("THANKS FOR PLAYING!");
+}
+
+/// prints the welcome/start message
+fn welcome() {
+    println!("
+                                Orbit
+              CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY
+
+
+
+    SOMEWHERE ABOVE YOUR PLANET IS A ROMULAN SHIP.
+
+    THE SHIP IS IN A CONSTANT POLAR ORBIT.  ITS
+    DISTANCE FROM THE CENTER OF YOUR PLANET IS FROM
+    10,000 TO 30,000 MILES AND AT ITS PRESENT VELOCITY CAN
+    CIRCLE YOUR PLANET ONCE EVERY 12 TO 36 HOURS.
+
+    UNFORTUNATELY, THEY ARE USING A CLOAKING DEVICE SO
+    YOU ARE UNABLE TO SEE THEM, BUT WITH A SPECIAL
+    INSTRUMENT YOU CAN TELL HOW NEAR THEIR SHIP YOUR
+    PHOTON BOMB EXPLODED.  YOU HAVE SEVEN HOURS UNTIL THEY
+    HAVE BUILT UP SUFFICIENT POWER IN ORDER TO ESCAPE
+    YOUR PLANET'S GRAVITY.
+
+    YOUR PLANET HAS ENOUGH POWER TO FIRE ONE BOMB AN HOUR.
+
+    AT THE BEGINNING OF EACH HOUR YOU WILL BE ASKED TO GIVE AN
+    ANGLE (BETWEEN 0 AND 360) AND A DISTANCE IN UNITS OF
+    100 MILES (BETWEEN 100 AND 300), AFTER WHICH YOUR BOMB'S
+    DISTANCE FROM THE ENEMY SHIP WILL BE GIVEN.
+
+    AN EXPLOSION WITHIN 5,000 MILES OF THE ROMULAN SHIP
+    WILL DESTROY IT.
+
+    BELOW IS A DIAGRAM TO HELP YOU VISUALIZE YOUR PLIGHT.
+
+
+                              90
+                        0000000000000
+                     0000000000000000000
+                   000000           000000
+                 00000                 00000
+                00000    XXXXXXXXXXX    00000
+               00000    XXXXXXXXXXXXX    00000
+              0000     XXXXXXXXXXXXXXX     0000
+             0000     XXXXXXXXXXXXXXXXX     0000
+            0000     XXXXXXXXXXXXXXXXXXX     0000
+    180<== 00000     XXXXXXXXXXXXXXXXXXX     00000 ==>0
+            0000     XXXXXXXXXXXXXXXXXXX     0000
+             0000     XXXXXXXXXXXXXXXXX     0000
+              0000     XXXXXXXXXXXXXXX     0000
+               00000    XXXXXXXXXXXXX    00000
+                00000    XXXXXXXXXXX    00000
+                 00000                 00000
+                   000000           000000
+                     0000000000000000000
+                        0000000000000
+                             270
+
+    X - YOUR PLANET
+    O - THE ORBIT OF THE ROMULAN SHIP
+
+    ON THE ABOVE DIAGRAM, THE ROMULAN SHIP IS CIRCLING
+    COUNTERCLOCKWISE AROUND YOUR PLANET.  DON'T FORGET THAT
+    WITHOUT SUFFICIENT POWER THE ROMULAN SHIP'S ALTITUDE
+    AND ORBITAL RATE WILL REMAIN CONSTANT.
+
+    GOOD LUCK.  THE FEDERATION IS COUNTING ON YOU.
+    ");
+}
+