Get basic math working

src/main.rs

@@ -22,9 +22,17 @@ fn main() {
 
     // Get user choice on what they want to use
     loop {
+        //Print choices
+        println!("Here are the current math tools:\n");
+        println!("1. Additon");
+        println!("2. Subtraction");
+        println!("3. Multiplication");
+        println!("4. Division");
+
+        // Get user input
         let mut user_input = String::new();
 
-        println!("Please select a function below or use 'q' to quit:");
+        println!("Please select a function above or use 'q' to quit:");
 
         io::stdin().read_line(&mut user_input)
             .expect("Failed to read line");
@@ -38,14 +46,84 @@ fn main() {
         // Match statement to run choice
         match num {
             Ok(num) => {
-                run_function(num);               
+                let result = run_function(num);               
+                println!("The result was: {}", result);
             } 
             Err(_) => println!("Invalid input. Please try again."),
         }
     }
 }
 
-fn run_function(num: i32) {
+fn run_function(num: i32) -> i32 {
 // run choice, then ask again or quit if the user selects that option
-println!("{}",num)
+    match num {
+        1 => addition(),
+        2 => subtraction(),
+        3 => multiplacation(),
+        4 => division(),
+        _ => {
+            println!("{} is not a valid selection, please select one of the options below", num);
+            0
+        }
+    }
+}
+
+fn addition() -> i32 {
+    println!("Please enter the value of the first number:");
+
+    let mut x = String::new();
+    io::stdin().read_line(&mut x).expect("Failed to read x value");
+    let x: i32 = x.trim().parse().expect("Failed to parse x value");
+
+    println!("Please enter the value of the second number:");
+    let mut y = String::new();
+    io::stdin().read_line(&mut y).expect("Failed to read y value");
+    let y: i32 = y.trim().parse().expect("Failed to parse y value");
+
+    x + y
+}
+
+fn subtraction() -> i32 {
+    println!("Please enter the value of the first number:");
+
+    let mut x = String::new();
+    io::stdin().read_line(&mut x).expect("Failed to read x value");
+    let x: i32 = x.trim().parse().expect("Failed to parse x value");
+
+    println!("Please enter the value of the second number:");
+    let mut y = String::new();
+    io::stdin().read_line(&mut y).expect("Failed to read y value");
+    let y: i32 = y.trim().parse().expect("Failed to parse y value");
+
+    x - y
+}
+
+fn multiplacation() -> i32 {
+    println!("Please enter the value of the first number:");
+
+    let mut x = String::new();
+    io::stdin().read_line(&mut x).expect("Failed to read x value");
+    let x: i32 = x.trim().parse().expect("Failed to parse x value");
+
+    println!("Please enter the value of the second number:");
+    let mut y = String::new();
+    io::stdin().read_line(&mut y).expect("Failed to read y value");
+    let y: i32 = y.trim().parse().expect("Failed to parse y value");
+
+    x * y
+}
+
+fn division() -> i32 {
+    println!("Please enter the value of the first number:");
+
+    let mut x = String::new();
+    io::stdin().read_line(&mut x).expect("Failed to read x value");
+    let x: i32 = x.trim().parse().expect("Failed to parse x value");
+
+    println!("Please enter the value of the second number:");
+    let mut y = String::new();
+    io::stdin().read_line(&mut y).expect("Failed to read y value");
+    let y: i32 = y.trim().parse().expect("Failed to parse y value");
+
+    x / y
 }