CODE EXAMPLE FOR C

Program to find second largest number in an array

public static void main()
  {
    a1(new int[]{1, 2, 3, 4});
    a1(new int[]{4, 1, 2, 3});
    a1(new int[]{1, 1, 2, 2});
    a1(new int[]{1, 1});
    a1(new int[]{1});
    a1(new int[]{});
  }
	
  static int a1(int[] a)
  {
    int max1 = -1;
    int max2 = -1;
		
    for (int i=0; i<a.length; i++)
    {
      if (a[i] > max1)
      {
        max2 = max1;
        max1 = a[i];
      }
      else if (a[i] != max1 && a[i] > max2)
        max2 = a[i];
    }
		
    return max2;
  }