mirror of
https://github.com/coding-horror/basic-computer-games.git
synced 2025-12-26 04:41:52 -08:00
104 lines
3.2 KiB
Rust
104 lines
3.2 KiB
Rust
/*
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The responsibilities that remain in the main function after separating concerns
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should be limited to the following:
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- Setting up any configuration
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- Calling a run function in lib.rs
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- Handling the error if run returns an error
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*/
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use std::process; //allows for some better error handling
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mod lib;
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use lib::Config;
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/// main function
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fn main() {
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//greet user
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welcome();
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// set up other configuration
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let mut config = Config::new().unwrap_or_else(|err| {
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eprintln!("Problem configuring program: {}", err);
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process::exit(1);
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});
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// run the program
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if let Err(e) = lib::run(&mut config) {
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eprintln!("Application Error: {}", e); //use the eprintln! macro to output to standard error
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process::exit(1); //exit the program with an error code
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}
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//end of program
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println!("THANKS FOR PLAYING!");
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}
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/// prints the welcome/start message
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fn welcome() {
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println!("
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Orbit
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CREATIVE COMPUTING MORRISTOWN, NEW JERSEY
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SOMEWHERE ABOVE YOUR PLANET IS A ROMULAN SHIP.
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THE SHIP IS IN A CONSTANT POLAR ORBIT. ITS
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DISTANCE FROM THE CENTER OF YOUR PLANET IS FROM
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10,000 TO 30,000 MILES AND AT ITS PRESENT VELOCITY CAN
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CIRCLE YOUR PLANET ONCE EVERY 12 TO 36 HOURS.
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UNFORTUNATELY, THEY ARE USING A CLOAKING DEVICE SO
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YOU ARE UNABLE TO SEE THEM, BUT WITH A SPECIAL
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INSTRUMENT YOU CAN TELL HOW NEAR THEIR SHIP YOUR
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PHOTON BOMB EXPLODED. YOU HAVE SEVEN HOURS UNTIL THEY
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HAVE BUILT UP SUFFICIENT POWER IN ORDER TO ESCAPE
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YOUR PLANET'S GRAVITY.
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YOUR PLANET HAS ENOUGH POWER TO FIRE ONE BOMB AN HOUR.
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AT THE BEGINNING OF EACH HOUR YOU WILL BE ASKED TO GIVE AN
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ANGLE (BETWEEN 0 AND 360) AND A DISTANCE IN UNITS OF
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100 MILES (BETWEEN 100 AND 300), AFTER WHICH YOUR BOMB'S
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DISTANCE FROM THE ENEMY SHIP WILL BE GIVEN.
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AN EXPLOSION WITHIN 5,000 MILES OF THE ROMULAN SHIP
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WILL DESTROY IT.
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BELOW IS A DIAGRAM TO HELP YOU VISUALIZE YOUR PLIGHT.
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90
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0000000000000
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0000000000000000000
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000000 000000
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00000 00000
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00000 XXXXXXXXXXX 00000
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00000 XXXXXXXXXXXXX 00000
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0000 XXXXXXXXXXXXXXX 0000
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0000 XXXXXXXXXXXXXXXXX 0000
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0000 XXXXXXXXXXXXXXXXXXX 0000
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180<== 00000 XXXXXXXXXXXXXXXXXXX 00000 ==>0
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0000 XXXXXXXXXXXXXXXXXXX 0000
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0000 XXXXXXXXXXXXXXXXX 0000
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0000 XXXXXXXXXXXXXXX 0000
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00000 XXXXXXXXXXXXX 00000
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00000 XXXXXXXXXXX 00000
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00000 00000
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000000 000000
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0000000000000000000
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0000000000000
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270
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X - YOUR PLANET
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O - THE ORBIT OF THE ROMULAN SHIP
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ON THE ABOVE DIAGRAM, THE ROMULAN SHIP IS CIRCLING
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COUNTERCLOCKWISE AROUND YOUR PLANET. DON'T FORGET THAT
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WITHOUT SUFFICIENT POWER THE ROMULAN SHIP'S ALTITUDE
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AND ORBITAL RATE WILL REMAIN CONSTANT.
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GOOD LUCK. THE FEDERATION IS COUNTING ON YOU.
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");
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}
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