Add initial samples

Author: chanakaudaya

guessing-game/.gitignore

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+/target
+**/*.rs.bk

guessing-game/Cargo.lock

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+[package]
+name = "guessing-game"
+version = "0.1.0"
+authors = ["Chanaka Fernando <chanaka.leadership@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rand = "0.3.14"

guessing-game/Cargo.toml

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+use std::io;
+use std::cmp::Ordering;
+use rand::Rng;
+
+fn main() {
+    println!("Hello, world!");
+    println!("Guess the number!");
+
+    let secret_number = rand::thread_rng().gen_range(1, 101);
+
+    loop {
+
+    println!("Please input your guess.");
+
+    let mut guess = String::new();
+    io::stdin().read_line(&mut guess).
+                expect("Failed to read line");
+    
+    let guess: u32 = match guess.trim().parse() {
+        Ok(num) => num,
+        Err(_) => continue,
+    };
+                                 
+
+    println!("You guessed this number: {}", guess);
+
+    match guess.cmp(&secret_number) {
+        Ordering::Less => println!("Too small!"),
+        Ordering::Greater => println!("Too big!"),
+        Ordering::Equal =>  {
+            println!("You win!"); 
+            println!("The secret number is: {}", secret_number);
+            break;
+            }
+    }
+    }
+
+}

guessing-game/src/main.rs

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+fn main() {
+    println!("Hello, world!");
+}

hello-world/hello

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+/target
+**/*.rs.bk

hello-world/hello.rs

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+[package]
+name = "hello_cargo"
+version = "0.1.0"
+authors = ["Chanaka Fernando <chanaka.leadership@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

hello_cargo/.gitignore

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+fn main() {
+    println!("Hello, world!");
+}