diff --git a/.idea/rust_study.iml b/.idea/rust_study.iml
index 91e2829..a5bf69f 100644
--- a/.idea/rust_study.iml
+++ b/.idea/rust_study.iml
@@ -6,9 +6,13 @@
+
+
+
+
diff --git a/6.flow_and_control/Cargo.toml b/6.flow_and_control/Cargo.toml
new file mode 100644
index 0000000..b1f4777
--- /dev/null
+++ b/6.flow_and_control/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "flow_and_control"
+edition = "2021"
+version.workspace = true
+
+[dependencies]
+# https://crates.io/search?q=rand
+rand = "0.8.4"
diff --git a/6.flow_and_control/src/main.rs b/6.flow_and_control/src/main.rs
new file mode 100644
index 0000000..01786e7
--- /dev/null
+++ b/6.flow_and_control/src/main.rs
@@ -0,0 +1,34 @@
+use std::ops::Range;
+
+use rand::Rng;
+
+fn gen_rand_num(rng:Range) -> impl Fn() -> i32 {
+ let self_rng = rng.clone();
+ // 使用 move 将变量的所有权转移到闭包中
+ move || -> i32 {
+ rand_num(self_rng.clone())
+ }
+}
+
+fn rand_num(rng:Range) -> i32 {
+ rand::thread_rng().gen_range(rng)
+}
+
+fn main() {
+ // 生成一个闭包，该闭包每次调用时返回一个 -100 到 100 之间的随机数
+ let fn_rand_num = gen_rand_num(-100..100);
+ // 调用闭包，获取随机数
+ let mut num:i32 = fn_rand_num();
+
+ let max_num = rand::thread_rng().gen_range(0..10);
+ let min_num = rand::thread_rng().gen_range(-10..0);
+
+ println!("当随机生成的数 >= {} 且 <= {} 时结束", min_num,max_num);
+ while num < min_num || num > max_num {
+ println!("随机数为: {}", num);
+ num = fn_rand_num();
+ }
+
+ println!("当随机生成的数 >={} 且 <= {}时结束", min_num,max_num);
+ println!("最终的随机数为: {}", num);
+}
diff --git a/Cargo.toml b/Cargo.toml
index f7e3df1..48bd041 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,7 +17,7 @@ members = [
"2.hello_cargo",
"3.guessing_game",
"4.variables",
- "5.function",
+ "5.function", "6.flow_and_control",
"x.bubble_sort"
]