diff --git a/animation-simulation/数组篇/leetcode27移除元素.md b/animation-simulation/数组篇/leetcode27移除元素.md
index a7a51b8..1a14c5b 100644
--- a/animation-simulation/数组篇/leetcode27移除元素.md
+++ b/animation-simulation/数组篇/leetcode27移除元素.md
@@ -95,7 +95,7 @@ class Solution {
               return 0;
           }
           int i = 0;
-          for (int j = 0; j < nums.length; ++j) {
+          for (int j = 0; j < len; ++j) {
                 //如果等于目标值，则删除
                 if (nums[j] == val) {
                     continue;
@@ -110,7 +110,7 @@ class Solution {
 
 Python3 Code:
 
-```py
+```python
 class Solution:
     def removeElement(self, nums: List[int], val: int) -> int:
         i = 0
@@ -121,3 +121,21 @@ class Solution:
         return i
 ```
 
+C++ Code:
+
+```cpp
+class Solution {
+public:
+    int removeElement(vector<int>& nums, int val) {
+        int n = nums.size();
+      	if(!n) return 0;
+      	int i = 0;
+      	for(int j = 0; j < n; ++j){
+          if(nums[j] == val) continue;
+          nums[i++] = nums[j];
+        }
+      	return i;
+    }
+};
+```
+
diff --git a/animation-simulation/数组篇/leetcode41缺失的第一个正数.md b/animation-simulation/数组篇/leetcode41缺失的第一个正数.md
index 6c46f4d..73dacaf 100644
--- a/animation-simulation/数组篇/leetcode41缺失的第一个正数.md
+++ b/animation-simulation/数组篇/leetcode41缺失的第一个正数.md
@@ -119,7 +119,7 @@ class Solution {
 
 Python3 Code:
 
-```py
+```python
 class Solution:
     def firstMissingPositive(self, nums: List[int]) -> int:
         n = len(nums)
diff --git a/animation-simulation/数组篇/剑指offer3数组中重复的数.md b/animation-simulation/数组篇/剑指offer3数组中重复的数.md
index f20a2d0..f817fdd 100644
--- a/animation-simulation/数组篇/剑指offer3数组中重复的数.md
+++ b/animation-simulation/数组篇/剑指offer3数组中重复的数.md
@@ -57,6 +57,8 @@ class Solution {
 
 **题目代码**
 
+Java Code:
+
 ```java
 class Solution {
     public int findRepeatNumber(int[] nums) {
@@ -80,3 +82,22 @@ class Solution {
 }
 ```
 
+C++ Code:
+
+```cpp
+class Solution {
+public:
+    int findRepeatNumber(vector<int>& nums) {
+	if(nums.empty()) return 0;
+      	int n = nums.size();
+      	for(int i = 0; i < n; ++i){
+          while(nums[i] != i){
+            if(nums[i] == nums[nums[i]]) return nums[i];
+            swap(nums[i], nums[nums[i]]);
+          }
+        }
+      return -1;
+    }
+};
+```
+
diff --git a/animation-simulation/数组篇/长度最小的子数组.md b/animation-simulation/数组篇/长度最小的子数组.md
index d0eaee6..2e88fb0 100644
--- a/animation-simulation/数组篇/长度最小的子数组.md
+++ b/animation-simulation/数组篇/长度最小的子数组.md
@@ -38,6 +38,8 @@
 
 #### 题目代码
 
+Java Code:
+
 ```java
 class Solution {
     public int minSubArrayLen(int s, int[] nums) {
@@ -60,3 +62,23 @@ class Solution {
 }
 ```
 
+C++ Code:
+
+```cpp
+class Solution {
+public:
+    int minSubArrayLen(int t, vector<int>& nums) {
+		int n = nums.size();
+      	int i = 0, sum = 0, winlen = INT_MAX;
+      	for(int j = 0; j < n; ++j){
+          sum += nums[j];
+          while(sum >= t){
+            winlen = min(winlen, j - i + 1);
+            sum -= nums[i++];
+          }
+        }
+      return winlen == INT_MAX? 0: winlen;
+    }
+};
+```
+