diff --git a/codes/rust/chapter_dynamic_programming/coin_change_ii.rs b/codes/rust/chapter_dynamic_programming/coin_change_ii.rs
index 3da73510a..8306e530d 100644
--- a/codes/rust/chapter_dynamic_programming/coin_change_ii.rs
+++ b/codes/rust/chapter_dynamic_programming/coin_change_ii.rs
@@ -20,7 +20,7 @@ fn coin_change_ii_dp(coins: &[i32], amt: usize) -> i32 {
                 // 若超过目标金额，则不选硬币 i
                 dp[i][a] = dp[i - 1][a];
             } else {
-                // 不选和选硬币 i 这两种方案的较小值
+                // 不选和选硬币 i 这两种方案之和
                 dp[i][a] = dp[i - 1][a] + dp[i][a - coins[i - 1] as usize];
             }
         }
@@ -41,7 +41,7 @@ fn coin_change_ii_dp_comp(coins: &[i32], amt: usize) -> i32 {
                 // 若超过目标金额，则不选硬币 i
                 dp[a] = dp[a];
             } else {
-                // 不选和选硬币 i 这两种方案的较小值
+                // 不选和选硬币 i 这两种方案之和
                 dp[a] = dp[a] + dp[a - coins[i - 1] as usize];
             }
         }
diff --git a/docs/chapter_data_structure/basic_data_types.md b/docs/chapter_data_structure/basic_data_types.md
index 31c8d46e3..d1a020ccc 100644
--- a/docs/chapter_data_structure/basic_data_types.md
+++ b/docs/chapter_data_structure/basic_data_types.md
@@ -138,7 +138,7 @@
     ```rust title=""
     // 使用多种基本数据类型来初始化数组
     let numbers: Vec<i32> = vec![0; 5];
-    let decimals: Vec<f32> = vec![0.0, 5];
+    let decimals: Vec<f32> = vec![0.0; 5];
     let characters: Vec<char> = vec!['0'; 5];
     let bools: Vec<bool> = vec![false; 5];
     ```