Code to find smallest & second smallest elements in an array

Array Rotation.cpp

@@ -0,0 +1,42 @@
+// C++ program to rotate an array by
+// d elements
+#include <bits/stdc++.h>
+using namespace std;
+
+/*Function to left Rotate arr[] of
+  size n by 1*/
+void leftRotatebyOne(int arr[], int n)
+{
+    int temp = arr[0], i;
+    for (i = 0; i < n - 1; i++)
+        arr[i] = arr[i + 1];
+
+    arr[n-1] = temp;
+}
+
+/*Function to left rotate arr[] of size n by d*/
+void leftRotate(int arr[], int d, int n)
+{
+    for (int i = 0; i < d; i++)
+        leftRotatebyOne(arr, n);
+}
+
+/* utility function to print an array */
+void printArray(int arr[], int n)
+{
+    for (int i = 0; i < n; i++)
+        cout << arr[i] << " ";
+}
+
+/* Driver program to test above functions */
+int main()
+{
+    int arr[] = { 1, 2, 3, 4, 5, 6, 7 };
+    int n = sizeof(arr) / sizeof(arr[0]);
+
+    // Function calling
+    leftRotate(arr, 2, n);
+    printArray(arr, n);
+
+    return 0;
+}

Find the smallest and second smallest elements in an array.cpp

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+// C++ program to find smallest and
+// second smallest elements
+#include <bits/stdc++.h>
+using namespace std; /* For INT_MAX */
+
+void print2Smallest(int arr[], int arr_size)
+{
+    int i, first, second;
+
+    /* There should be atleast two elements */
+    if (arr_size < 2)
+    {
+        cout<<" Invalid Input ";
+        return;
+    }
+
+    first = second = INT_MAX;
+    for (i = 0; i < arr_size ; i ++)
+    {
+        /* If current element is smaller than first
+        then update both first and second */
+        if (arr[i] < first)
+        {
+            second = first;
+            first = arr[i];
+        }
+
+        /* If arr[i] is in between first and second
+        then update second */
+        else if (arr[i] < second && arr[i] != first)
+            second = arr[i];
+    }
+    if (second == INT_MAX)
+        cout << "There is no second smallest element\n";
+    else
+        cout << "The smallest element is " << first << " and second "
+            "Smallest element is " << second << endl;
+}
+
+/* Driver code */
+int main()
+{
+    int arr[] = {12, 13, 1, 10, 34, 1};
+    int n = sizeof(arr)/sizeof(arr[0]);
+    print2Smallest(arr, n);
+    return 0;
+}