Description
Arrays in Rust Consider the following code: fn main(){ let mut groups = [[“”; 4]; 6]; groups[0]=[“Bob”, “Carol”, “Eric”, “Matt”]; groups[1]=[“Jim”, “Lucy”, “Terry”, “Brenda”]; groups[2]=[“Susan”, “Brad”, “Jim”, “Matt”]; groups[3]=[“Sue”, “Wendy”, “Sam”, “Brad”]; groups[4]=[“Kate”, “Jack”, “James”, “Sydney”]; groups[5]=[“Mary”, “John”, “Ricky”, “Wendy”]; } This main function contains the names of the members in six research group. Question 1: You need to write a new function called searchMember to search for a member and report the following information: ● Their name’s existence in the list (yes or not) ● Their “group number” (some members are in more than one group) ● Whether they are a group leader (the first person listed in each group is indicated as its leader) DEMO this deliverable to the lab instructor. Binary Tree A binary tree is a tree data structure in which each node has at most two children, which are referred to as the left child and the right child. In other words, each node in a binary tree: 1- must have a value 2- may or may not have left and/or right child One can describe a single node as follows: #[derive(Debug)] struct TreeNode { data: &str, left_child: Option, right_child: Option, } Question 2: Try to run the above code. Does it run? If not, explain why and rewrite the code so it runs. ● DEMO this deliverable to the lab instructor. 1 ECE 522 | Software Construction, Verification and Evolution Question 3: Write insert_node function that inserts a node with a given value. You can use the following code snippet. pub fn insert_node(&self, data: &str) { if self.data == data { return } let new_node = if data < self.data { &self.left_child } else { &self.right_child }; match ………… } ● DEMO this deliverable to the lab instructor. Question 4: Let’s assume your TreeNode struct is replaced with the following Tree enum: #[derive(Debug)] enum Tree { Node { data: T, left_child: Box<Tree>, right_child: Box<Tree>, }, Empty, } What changes do you need to make to your insertion code to run the code? What is the purpose of Empty? Which solution (struct-based or enum-based) is better? ● DEMO this deliverable to the lab instructor. 2
