Find the smallest and second smallest element in an array

2ndmin.c

#include <stdio.h>
#include <limits.h> /* For INT_MAX */
 
/* Function to print first smallest and second smallest elements */
void print2Smallest(int arr[], int arr_size)
{
    int i, first, second;
 
    /* There should be atleast two elements */
    if (arr_size < 2)
    {
        printf(" 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)
        printf("There is no second smallest element\n");
    else
        printf("The smallest element is %d and second Smallest element is %d\n",
               first, second);
}
 
 
/* Driver program to test above function */
int main()
{
    int arr[] = {12, 13, 1, 10, 34, 1};
    int n = sizeof(arr)/sizeof(arr[0]);
    print2Smallest(arr, n);
    return 0;
}