feat: add cpp solution to leetcode problem: No.0007. Reverse Integer

Author: maolonglong

solution/0000-0099/0007.Reverse Integer/README.md

@@ -88,6 +88,22 @@ class Solution {
 }
 ```
 
+### **C++**
+
+```cpp
+class Solution {
+public:
+    int reverse(int x) {
+        long long ans = 0;
+        while (x) {
+            ans = ans * 10 + x % 10;
+            x /= 10;
+        }
+        return ans < INT_MIN || ans > INT_MAX ? 0 : ans;
+    }
+};
+```
+
 ### **...**
 
 ```

solution/0000-0099/0007.Reverse Integer/README_EN.md

@@ -59,6 +59,22 @@ class Solution {
 }
 ```
 
+### **C++**
+
+```cpp
+class Solution {
+public:
+    int reverse(int x) {
+        long long ans = 0;
+        while (x) {
+            ans = ans * 10 + x % 10;
+            x /= 10;
+        }
+        return ans < INT_MIN || ans > INT_MAX ? 0 : ans;
+    }
+};
+```
+
 ### **...**
 
 ```

solution/0000-0099/0007.Reverse Integer/Solution.cpp

@@ -0,0 +1,11 @@
+class Solution {
+public:
+    int reverse(int x) {
+        long long ans = 0;
+        while (x) {
+            ans = ans * 10 + x % 10;
+            x /= 10;
+        }
+        return ans < INT_MIN || ans > INT_MAX ? 0 : ans;
+    }
+};