Create ReverseArrayInGroups.cpp

ReverseArrayInGroups.cpp

@@ -0,0 +1,29 @@
+#include <bits/stdc++.h>
+using namespace std;
+//Reverse function..
+void reverse(int arr[], int n, int k)
+{
+    for (int i = 0; i < n; i += k)
+    {
+        int left = i;
+
+        // when k is not multiple of n..
+        int right = min(i + k - 1, n - 1);
+
+        // reverse the sub-array [left, right]
+        while (left < right)
+            swap(arr[left++], arr[right--]);
+
+    }
+}
+
+int main()
+{
+    int arr[] = {1, 2, 3, 4, 5, 6, 7, 8};
+    int k = 3;
+    int n = sizeof(arr) / sizeof(arr[0]);
+    reverse(arr, n, k);
+    for (int i = 0; i < n; i++)
+        cout << arr[i] << " ";
+    return 0;
+}