Enter the array items, and then use the swapping approach to arrange the numbers in descending order. Later, try printing the second-largest and second-smallest elements in an array using index location.

An array is used to store a collection of similar elements under a single identifier. The following are the array operations in the C programming language

• Insert
• Delete
• Search

Program The C program to get the second largest and second smallest values in an array is provided below.

#include <stdio.h>

int main()
{
    int N;
    scanf("%d", &N);

    int counter, number[30];
    int temp;

    for (int i = 0; i < N; i++)
    {
        scanf("%d", &number[i]);
    }

    for (int i = 0; i < N; i++)
    {
        for (int j = i + 1; j < N; j++)
        {
            if (number[i] < number[j])
            {
                temp = number[i];
                number[i] = number[j];
                number[j] = temp;
            }
        }
    }

    printf("The numbers arranged in descending order ");

    for (int i = 0; i < N; i++)
    {
        printf("%d ", number[i]);
    }

    printf("\n");

    printf("The 2nd largest number is = %d \n", number[1]);
    printf("The 2nd smallest number is = %d \n", number[N - 2]);

    return 0;
}

Output When the above program is executed, it produces the following result −

5
Enter the numbers
10
12
17
45
80

The numbers arranged in descending order

80
45
17
12
10

The 2nd largest number is = 45
The 2nd smallest number is = 12
The average of 2nd largest & 2nd smallest is not in the array

Algorithm Given below is an algorithm to find the second largest and the second smallest numbers in an array −

Step 1 − Declare and read the number of elements.

Step 2 − Declare and read the array size at runtime.

Step 3 − Input the array elements.

Step 4 − Arrange numbers in descending order.

Step 5 − Then, find the second largest and second smallest numbers by using an index.

Step 6 − Print the second largest and the second smallest numbers.