add: 8 projects

variables, shadowing, another_function, branches, loops, fahr2cel,
fibonacci, christmax_song

18 files changed, 263 insertions, 0 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 12e777b..b661321 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3,6 +3,14 @@
 version = 4
 
 [[package]]
+name = "another_function"
+version = "0.1.0"
+
+[[package]]
+name = "branches"
+version = "0.1.0"
+
+[[package]]
 name = "cfg-if"
 version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -20,6 +28,10 @@ dependencies = [
 ]
 
 [[package]]
+name = "christmas_song"
+version = "0.1.0"
+
+[[package]]
 name = "cpufeatures"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -29,6 +41,14 @@ dependencies = [
 ]
 
 [[package]]
+name = "fahr2cel"
+version = "0.1.0"
+
+[[package]]
+name = "fibonacci"
+version = "0.1.0"
+
+[[package]]
 name = "getrandom"
 version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -62,6 +82,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3eaf3ede3fee6db1a4c2ee091bf8a8b4dccdc6d17f656fb07896ee72867612f2"
 
 [[package]]
+name = "loops"
+version = "0.1.0"
+
+[[package]]
 name = "r-efi"
 version = "6.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -83,3 +107,11 @@ name = "rand_core"
 version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "63b8176103e19a2643978565ca18b50549f6101881c443590420e4dc998a3c69"
+
+[[package]]
+name = "shadowing"
+version = "0.1.0"
+
+[[package]]
+name = "variables"
+version = "0.1.0"
diff --git a/Cargo.toml b/Cargo.toml
index 46d9f2e..6548d00 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,5 +3,13 @@ members = [
 		"src/hello_world",
 		"src/hello_cargo",
 		"src/guessing_game",
+		"src/variables",
+		"src/shadowing",
+		"src/another_function",
+		"src/branches",
+		"src/loops",
+		"src/fahr2cel",
+		"src/fibonacci",
+		"src/christmas_song",
 ]
 resolver = "2"
diff --git a/src/another_function/Cargo.toml b/src/another_function/Cargo.toml
new file mode 100644
index 0000000..7d60c8a
--- /dev/null
+++ b/src/another_function/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "another_function"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/src/another_function/src/main.rs b/src/another_function/src/main.rs
new file mode 100644
index 0000000..9da0175
--- /dev/null
+++ b/src/another_function/src/main.rs
@@ -0,0 +1,8 @@
+fn main() {
+    println!("First argument is: {}", print_labeled_measurement(5, 'h'));
+}
+
+fn print_labeled_measurement(value: i32, unit_label: char) -> i32 {
+    println!("The measurement is: {value}{unit_label}");
+    value
+}
diff --git a/src/branches/Cargo.toml b/src/branches/Cargo.toml
new file mode 100644
index 0000000..b12fd97
--- /dev/null
+++ b/src/branches/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "branches"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/src/branches/src/main.rs b/src/branches/src/main.rs
new file mode 100644
index 0000000..7fdaaaf
--- /dev/null
+++ b/src/branches/src/main.rs
@@ -0,0 +1,9 @@
+fn main() {
+    let number = 6;
+
+    if number < 5 {
+        println!("condition was true");
+    } else {
+        println!("condition was false");
+    }
+}
diff --git a/src/christmas_song/Cargo.toml b/src/christmas_song/Cargo.toml
new file mode 100644
index 0000000..25474b6
--- /dev/null
+++ b/src/christmas_song/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "christmas_song"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/src/christmas_song/src/main.rs b/src/christmas_song/src/main.rs
new file mode 100644
index 0000000..b04524d
--- /dev/null
+++ b/src/christmas_song/src/main.rs
@@ -0,0 +1,59 @@
+fn main() {
+    const DAYS_AND_GIFTS: [[&str; 3]; 12] = [
+        ["first", "a", "brand new SCV"],
+        ["second", "two", "Terran Wraiths"],
+        ["third", "three", "Marines"],
+        ["fourth", "four", "Hydralisks"],
+        ["fifth", "five", "newborn Queens"],
+        ["sixth", "six", "Zealots fighting"],
+        ["seventh", "seven", "Zerglings swarming"],
+        ["eighth", "eight", "Archons burning"],
+        ["ninth", "nine", "Battlecruisers"],
+        ["tenth", "ten", "Ultralisks"],
+        ["eleventh", "eleven", "Science Vessels"],
+        ["twelfth", "twelve", "Arbiters"],
+    ];
+
+    for i in 0..12 {
+        println!("On the {} day of Christmas, Blizzard gave to me:",
+            DAYS_AND_GIFTS[i][0]);
+        
+        let mut gifts = String::new();
+
+        for j in 0..=i {
+            gifts = match j {
+                0 => format!("{} {}.\n",
+                    DAYS_AND_GIFTS[j][1],
+                    DAYS_AND_GIFTS[j][2],),
+                1 => format!("{} {} and {gifts}",
+                    DAYS_AND_GIFTS[j][1],
+                    DAYS_AND_GIFTS[j][2]),
+                _ => format!("{}, {gifts}",
+                    match i {
+                        8 if j == 7 => "power overwhelming".to_string(),
+                        9 if j == 7 => "terror all-consuming".to_string(),
+                        10 if j == 7 => "I hate all this singing".to_string(),
+                        _ => format!("{} {}",
+                            DAYS_AND_GIFTS[j][1],
+                            DAYS_AND_GIFTS[j][2]),
+                    }
+                )
+            }
+        }
+
+        println!("{}", capitalize(&gifts));
+    }
+    
+    println!("Why am I so jolly?\n");
+    println!("Hey! Who spiked the egg nog?");
+}
+
+fn capitalize(s: &str) -> String {
+    let mut chars = s.chars();
+
+    match chars.next() {
+        Some(first) => first.to_uppercase().collect::<String>()
+            + chars.as_str(),
+        None => String::new(),
+    }
+}
diff --git a/src/fahr2cel/Cargo.toml b/src/fahr2cel/Cargo.toml
new file mode 100644
index 0000000..e407553
--- /dev/null
+++ b/src/fahr2cel/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "fahr2cel"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/src/fahr2cel/src/main.rs b/src/fahr2cel/src/main.rs
new file mode 100644
index 0000000..4ea4776
--- /dev/null
+++ b/src/fahr2cel/src/main.rs
@@ -0,0 +1,31 @@
+use std::io;
+
+fn main() {
+    println!("Enter \"q\" to quit.");
+
+    loop {
+        let mut user_input = String::new();
+
+        println!("Enter temperature in °F:");
+
+        io::stdin()
+            .read_line(&mut user_input)
+            .expect("Failed to read line.");
+
+        if user_input.trim() == "q" {
+            println!("Exiting.");
+            break;
+        }
+
+        let user_input: f64 = match user_input.trim().parse() {
+            Ok(num) => num,
+            Err(_) => continue,
+        };
+
+        println!("{user_input}°F -> °C: {:.2}", fahr2cel(user_input));
+    }
+}
+
+fn fahr2cel (fahr: f64) -> f64 {
+    (fahr - 32.0) * 5.0 / 9.0
+}
diff --git a/src/fibonacci/Cargo.toml b/src/fibonacci/Cargo.toml
new file mode 100644
index 0000000..15ac334
--- /dev/null
+++ b/src/fibonacci/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "fibonacci"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/src/fibonacci/src/main.rs b/src/fibonacci/src/main.rs
new file mode 100644
index 0000000..e5e973a
--- /dev/null
+++ b/src/fibonacci/src/main.rs
@@ -0,0 +1,36 @@
+use std::io;
+
+fn main() {
+    println!("Enter n:");
+
+    loop {
+        let mut user_input = String::new();
+
+        io::stdin()
+            .read_line(&mut user_input)
+            .expect("Failed to read line.");
+        
+        if user_input.trim() == "q" {
+            println!("Exiting.");
+            break;
+        }
+
+        let n: i32 = match user_input.trim().parse() {
+            Ok(num) => num,
+            Err(_) => continue,
+        };
+
+        let mut a: u64 = 0;
+        let mut b: u64 = 1;
+
+        // calc fibonacci[n]
+        for i in 0..n {
+            let next: u64 = a.checked_add(b)
+                .unwrap_or_else(|| panic!("overflow at {}", i));
+            a = b;
+            b = next;
+        }
+
+        println!("fibonacci[{n}]: {a}");
+    }
+}
diff --git a/src/loops/Cargo.toml b/src/loops/Cargo.toml
new file mode 100644
index 0000000..a046a76
--- /dev/null
+++ b/src/loops/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "loops"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/src/loops/src/main.rs b/src/loops/src/main.rs
new file mode 100644
index 0000000..683d18b
--- /dev/null
+++ b/src/loops/src/main.rs
@@ -0,0 +1,13 @@
+fn main() {
+    let mut counter = 0;
+
+    let result = loop {
+        counter += 1;
+
+        if counter == 10 {
+            break counter * 2;
+        }
+    };
+
+    println!("The result is {result}");
+}
diff --git a/src/shadowing/Cargo.toml b/src/shadowing/Cargo.toml
new file mode 100644
index 0000000..23403b4
--- /dev/null
+++ b/src/shadowing/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "shadowing"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/src/shadowing/src/main.rs b/src/shadowing/src/main.rs
new file mode 100644
index 0000000..03924fe
--- /dev/null
+++ b/src/shadowing/src/main.rs
@@ -0,0 +1,12 @@
+fn main() {
+    let x = 5;
+
+    let x = x + 1;
+
+    {
+        let x = x * 2;
+        println!("The value of x in the inner scope is: {x}");
+    }
+
+    println!("The value of x is: {x}");
+}
diff --git a/src/variables/Cargo.toml b/src/variables/Cargo.toml
new file mode 100644
index 0000000..c093eb6
--- /dev/null
+++ b/src/variables/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "variables"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/src/variables/src/main.rs b/src/variables/src/main.rs
new file mode 100644
index 0000000..2500651
--- /dev/null
+++ b/src/variables/src/main.rs
@@ -0,0 +1,7 @@
+fn main() {
+    let mut x: i32 = 5;
+    println!("The value of x is: {}", x);
+
+    x = 6;
+    println!("The value of x is: {}", x);
+}