Merge pull request #424 from ngweihow/feature/rust-circle-area

Rust: Find Area of Circle given Radius

Author: wzhouwzhou

rust/maths/ngweihow_areacircle.rs

@@ -0,0 +1,24 @@
+/**
+ Simple Rust One Liner to calculate area of circle.
+ Made to have fun and learn Rust. This is my first time writing working code in Rust.
+
+ Requires Cargo.
+ @author: github.com/ngweihow
+*/
+use std::io;
+use std::f32::consts::PI;
+
+fn main() {
+    println!("Enter the radius of the circle you want to calculate the area of: ");
+
+    let mut input = String::new();
+    io::stdin().read_line(&mut input)
+        .expect("Failed to read line!");
+
+    let float_input = input.trim().parse::<f32>().expect("Invalid Input!");
+
+    println!("The area of your circle is {} unit squared!", area_of_circle(float_input));
+}
+
+// Area of circle one liner.
+fn area_of_circle(r: f32) -> f32 { r.powf(2.0) * PI }