First two exercises for the piscine as a trial

.gitignore

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-node_modules
+node_modules
+**/target/**

rust/tests/fibonacci2_test/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "fibonacci"
+version = "0.1.0"
+
+[[package]]
+name = "fibonacci2_test"
+version = "0.1.0"
+dependencies = [
+ "fibonacci",
+]

rust/tests/fibonacci2_test/Cargo.toml

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+[package]
+name = "fibonacci2_test"
+version = "0.1.0"
+authors = ["Augusto <aug.ornelas@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+fibonacci = {path = "../../../../Documents/rust/rust-piscine-solutions/fibonacci"}

rust/tests/fibonacci2_test/src/main.rs

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+use fibonacci::*;
+
+#[test]
+fn it_works() {
+	assert_eq!(fibonacci(0), 0);
+	assert_eq!(fibonacci(1), 1);
+	assert_eq!(fibonacci(22), 17711);
+	assert_eq!(fibonacci(20), 6765);
+}

rust/tests/scalar_test/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "scalar"
+version = "0.1.0"
+
+[[package]]
+name = "scalar_test"
+version = "0.1.0"
+dependencies = [
+ "scalar",
+]

rust/tests/scalar_test/Cargo.toml

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+[package]
+name = "scalar_test"
+version = "0.1.0"
+authors = ["Augusto <aug.ornelas@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+scalar = {path = "../../../../Documents/rust/rust-piscine-solutions/scalar"}

rust/tests/scalar_test/src/main.rs

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+use scalar::*;
+
+#[test]
+#[should_panic]
+fn test_panic_sum() {
+	sum(25, 255);
+}
+
+#[test]
+#[should_panic]
+fn test_panic_diff() {
+	diff(-32768, 32766);
+}
+
+#[test]
+#[should_panic]
+fn test_panic_pro() {
+	pro(-128, 2);
+}
+
+#[test]
+fn pass() {
+	assert_eq!(sum(1, 2), 3);
+	assert_eq!(diff(1, 2), -1);
+	assert_eq!(pro(1, 2), 2);
+	assert_eq!(quo(1.0, 2.0), 0.5);
+	assert_eq!(rem(1.0, 2.0), 1.0);
+}

subjects/fibonacci2/README.md

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+## fibonacci2
+
+### Instructions
+
+Complete the body of the function `fibonacci`.
+
+This functions receives a number n and returns the nth number in the fibonacci series.
+
+The Fibonacci Series starts like this: 0, 1, 1, 2, 3, 5, 8, 13... so fibonacci(2) = 1 and fibonnacci(4) = 3
+
+
+### Expected function
+
+```rust
+ fn fibonacci(n: u32) -> u32 {
+
+ }
+```
+
+### Usage
+
+Here is a possible test for your function:
+
+```
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        assert_eq!(fibonacci(2), 1);
+        assert_eq!(fibonacci(4), 1);
+        assert_eq!(fibonacci(22), 17711);
+        assert_eq!(fibonacci(20), 6765);
+    }
+}
+```

subjects/scalar/README.md

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+## Scaler
+
+### Instructions
+Create the following functions, that receives two parameters:
+- sum, that returns the sum between two values from 0 to 255
+- diff, that returns the difference between two values from -32768 to 32767
+- pro, that returns the product of the multiplication between two values from -128 to 127
+- quo, that returns the quotient of the division between two values
+- rem, that returns the remainder of the division between two values
+### Notions
+- https://doc.rust-lang.org/book/ch03-02-data-types.html
+
+
+### Expected functions
+
+```rust
+pub fn sum(a:, b: ) ->  {
+	
+}
+
+pub fn diff(a: , b: ) -> {
+
+}
+
+pub fn pro(a: , b: ) -> {
+
+}
+
+pub fn quo(a: , b: ) -> {
+
+}
+
+pub fn rem(a: , b: ) -> {
+
+}
+```
+
+### Usage:
+
+```rust
+fn main() {
+    // sum
+    println!("sum : {}", sum(234, 2));
+    println!("sum : {}", sum(1, 255)); // 'ERROR: attempt to add with overflow'
+    // diff
+    println!("diff : {}", diff(234, 2));
+    println!("diff : {}", diff(-32768, 32766)); // 'ERROR: attempt to subtract with overflow'
+    // product
+    println!("pro : {}", pro(23, 2));
+    println!("pro : {}", pro(-128, 2)); // 'ERROR: attempt to multiply with overflow'
+    // quotient
+    println!("quo : {}", quo(22.0, 2.0));
+    println!("quo : {}", quo(-128.23, 2.0));
+    // remainder
+    println!("rem : {}", rem(22.0, 2.0));
+    println!("rem : {}", rem(-128.23, 2.0));
+}
+```