Add some arguments to do-random subcommand.

src/main.rs

@@ -2,7 +2,7 @@ mod bst;
 mod stack;
 mod sort;
 
-use clap::{Parser, Subcommand};
+use clap::{Args, Parser, Subcommand};
 use rand::Rng;
 use bst::BinarySearchTree;
 use stack::Stack;
@@ -17,7 +17,16 @@ struct Cli {
 #[derive(Subcommand, Debug)]
 enum Command {
     Default,
-    DoRandom,
+    DoRandom(DoRandomArgs),
+}
+
+#[derive(Args, Debug)]
+struct DoRandomArgs {
+    #[arg(long)]
+    min: i32,
+
+    #[arg(long)]
+    max: i32,
 }
 
 struct Greeter {
@@ -91,12 +100,12 @@ fn do_default() {
     println!("sorted chars: {:?}", sorted_chars);
 }
 
-fn do_random() {
+fn do_random(args: &DoRandomArgs) {
     let mut range = rand::thread_rng();
     let mut numbers = [0; 100];
     let mut i = 0;
     while i < numbers.len() {
-        numbers[i] = range.gen_range(1..100);
+        numbers[i] = range.gen_range(args.min..args.max);
         i += 1;
     }
     // println!("before sorting: {:?}", numbers);
@@ -113,8 +122,8 @@ fn main() {
             Command::Default => {
                 do_default();
             }
-            Command::DoRandom => {
-                do_random();
+            Command::DoRandom(args) => {
+                do_random(&args);
             }
         }
     }