feat(cpp): add reverse_32_bit_integer.cpp

Author: ongshunping

cpp/Math and Geometry/reverse_32_bit_integer.cpp

@@ -0,0 +1,20 @@
+#include <climits> 
+
+int reverse32BitInteger(int n) {
+    int reversedN = 0;
+    // Keep looping until we've added all digits of 'n' to 'reversedN' 
+    // in reverse order.
+    while (n != 0) {
+        // Extract the last digit of 'n'.
+        int digit = n % 10;
+        // Remove the last digit from 'n'.
+        n /= 10;
+        // Check for integer overflow or underflow.
+        if (reversedN > INT_MAX / 10 || reversedN < INT_MIN / 10) {
+            return 0;
+        }
+        // Add the current digit to 'reversedN'.
+        reversedN = reversedN * 10 + digit;
+    }
+    return reversedN;
+}