add: 8 projects

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

2 files changed, 37 insertions, 0 deletions

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
+}