rust implementation

21_Calendar/rust/Cargo.toml

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+[package]
+name = "rust"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

21_Calendar/rust/README.md

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+Original source downloaded [from Vintage Basic](http://www.vintage-basic.net/games.html)
+
+Conversion to [Rust](https://www.rust-lang.org/) by [Uğur Küpeli](https://github.com/ugurkupeli)

21_Calendar/rust/src/main.rs

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+use std::io::stdin;
+
+const WIDTH: usize = 64;
+const DAYS_WIDTH: usize = WIDTH / 8;
+const MONTH_WIDTH: usize = WIDTH - (DAYS_WIDTH * 2);
+const DAY_NUMS_WIDTH: usize = WIDTH / 7;
+
+const DAYS: [&str; 7] = [
+    "SUNDAY",
+    "MONDAY",
+    "TUESDAY",
+    "WEDNESDAY",
+    "THURSDAY",
+    "FRIDAY",
+    "SATURDAY",
+];
+
+fn main() {
+    println!("\n\t\t CALENDAR");
+    println!("CREATIVE COMPUTING MORRISTOWN, NEW JERSEY\n");
+
+    let (starting_day, leap_year) = prompt();
+    let (months, total_days) = get_months_and_days(leap_year);
+
+    let mut days_passed = 0;
+    let mut current_day_index = DAYS.iter().position(|d| *d == starting_day).unwrap();
+
+    for (month, days) in months {
+        print_header(month, days_passed, total_days - days_passed);
+        print_days(&mut current_day_index, days);
+        days_passed += days as u16;
+        println!("\n");
+    }
+}
+
+fn prompt() -> (String, bool) {
+    let mut day = String::new();
+
+    loop {
+        println!("\nFirst day of the year?");
+        if let Ok(_) = stdin().read_line(&mut day) {
+            day = day.trim().to_uppercase();
+            if DAYS.contains(&day.as_str()) {
+                break;
+            } else {
+                day.clear();
+            }
+        }
+    }
+
+    let mut leap = false;
+
+    loop {
+        println!("Is this a leap year?");
+        let mut input = String::new();
+        if let Ok(_) = stdin().read_line(&mut input) {
+            match input.to_uppercase().trim() {
+                "Y" | "YES" => {
+                    leap = true;
+                    break;
+                }
+                "N" | "NO" => break,
+                _ => (),
+            }
+        }
+    }
+
+    println!();
+    (day, leap)
+}
+
+fn get_months_and_days(leap_year: bool) -> (Vec<(String, u8)>, u16) {
+    let months = [
+        "JANUARY",
+        "FEBUARY",
+        "MARCH",
+        "APRIL",
+        "MAY",
+        "JUNE",
+        "JULY",
+        "AUGUST",
+        "SEPTEMBER",
+        "OCTOBER",
+        "NOVEMBER",
+        "DECEMBER",
+    ];
+
+    let mut months_with_days = Vec::new();
+    let mut total_days: u16 = 0;
+
+    for (i, month) in months.iter().enumerate() {
+        let days = if i == 1 {
+            if leap_year {
+                29u8
+            } else {
+                28
+            }
+        } else if if i < 7 { (i % 2) == 0 } else { (i % 2) != 0 } {
+            31
+        } else {
+            30
+        };
+
+        total_days += days as u16;
+        months_with_days.push((month.to_string(), days));
+    }
+
+    (months_with_days, total_days)
+}
+
+fn print_between(s: String, w: usize, star: bool) {
+    let s = format!(" {s} ");
+    if star {
+        print!("{:*^w$}", s);
+        return;
+    }
+    print!("{:^w$}", s);
+}
+
+fn print_header(month: String, days_passed: u16, days_left: u16) {
+    print_between(days_passed.to_string(), DAYS_WIDTH, true);
+    print_between(month.to_string(), MONTH_WIDTH, true);
+    print_between(days_left.to_string(), DAYS_WIDTH, true);
+    println!();
+
+    for d in DAYS {
+        let d = d.chars().nth(0).unwrap();
+        print_between(d.to_string(), DAY_NUMS_WIDTH, false);
+    }
+    println!();
+
+    println!("{:*>WIDTH$}", "");
+}
+
+fn print_days(current_day_index: &mut usize, days: u8) {
+    let mut current_date = 1u8;
+
+    print!("{:>w$}", " ", w = DAY_NUMS_WIDTH * *current_day_index);
+
+    for _ in 1..=days {
+        print_between(current_date.to_string(), DAY_NUMS_WIDTH, false);
+
+        if ((*current_day_index + 1) % 7) == 0 {
+            *current_day_index = 0;
+            println!();
+        } else {
+            *current_day_index += 1;
+        }
+
+        current_date += 1;
+    }
+}