added code to file

1 files changed, 99 insertions, 1 deletions

diff --git a/src/main.rs b/src/main.rs
index e7a11a9..7025e81 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,101 @@
+use rand::Rng;
+
+// snakes and ladders board, '0' represents an empty space
+// any other number is where that snake or ladder will put you.
+const BOARD: [u8; 100] = [
+    0, 0, 0, 14, 0, 0, 0, 0, 31, 0,
+    0, 0, 0, 0, 0, 0, 7, 0, 0, 0,
+    42, 0, 0, 0, 0, 0, 0, 84, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    67, 0, 0, 34, 0, 0, 0, 0, 0, 0,
+    0, 19, 0, 60, 0, 0, 0, 0, 0, 0,
+    0, 91, 0, 0, 0, 0, 0, 0, 0, 99,
+    0, 0, 0, 0, 0, 0, 36, 0, 0, 0,
+    0, 0, 73, 0, 75, 0, 0, 79, 0, 0];
+
+fn turn(mut space: u8) -> u8 {
+    let mut rng = rand::thread_rng();
+
+    let roll: u8 = rng.gen_range(1..7); // rolls the dice (random number 1-6)
+    space += roll; // adds rolls to current space
+
+    // outputs the current space and roll to the user
+    println!("You rolled a {}.", roll); 
+    println!("You are now on space {}.", space);
+
+    // returns 'space'
+    space
+}
+
+fn check_over_goal(mut space: u8) -> u8 {
+    if space > 100 { // checks if the player has gone over the goal
+        let spaces_over = space - 100; // gets how many spaces the user has gone over 100
+        space -= spaces_over * 2; // decreases current spaces by 'spaces over 100' * 2 (*2 is necessary to reduce the space below 100)
+
+        // outputs the current space and how many spaces over 100 to the user
+        println!("You have rolled {} spaces over 100.", spaces_over);
+        println!("You are now on space {}.", space);
+    }
+
+    // returns 'space'
+    space
+}
+
+fn check_movement(mut space: u8) -> u8 {
+    // converts the space into an index and 'usize' type
+    let space_index: usize = (space - 1).into(); 
+
+    if BOARD[space_index] != 0 {
+        let mut thing = ""; // thing is either a snake or a ladder
+        if BOARD[space_index] > space { // if space is smaller than the index of 'BOARD', it's a ladder
+            thing = "ladder";
+        } else if BOARD[space_index] < space {
+            thing = "snake"; // if space is bigger than the index of 'BOARD', it's a snake
+        }
+        
+        space = BOARD[space_index]; // sets space to the end of the object (snake or ladder)
+
+        // outputs the current space and the object to the user
+        println!("You have landed on a {}.", thing); 
+        println!("You are now on space {}.", space);
+    }
+
+    // returns 'space'
+    space
+}
+
 fn main() {
-    println!("Hello, world!");
+    // define variables
+    let mut space: u8 = 1;
+    let mut turns: u16 = 0;
+    let mut play: bool = true;
+
+    // print name of game
+    println!("Snakes & Ladders");
+
+    // code loop
+    while play {
+        // logic for inputs
+        let mut input = String::new();
+        std::io::stdin().read_line(&mut input).expect("");
+        input = input.trim().to_owned(); // trims whitespace of front and end of input
+        if input.len() == 1 && input == "q" { // if input == q, quit program
+            return;
+        }
+
+        turns += 1;
+
+        // play 1 turn
+        space = turn(space);
+
+        // check if the user has won
+        play = space != 100;
+
+        space = check_over_goal(space);
+        space = check_movement(space);
+    }
+
+    // tells the user they've won and how many turns it took.
+    println!("\nYou win!!!\nIt took {} turns.", turns);
 }