C Program to insert an element in array

Category: C ProgramTags: array cprogram

C Program to insert an element in an array at a given position.

C Program to insert an element in an array

#include <stdio.h>

void main()
{
    int arr[50], size, pos, i, num;

    printf("Enter number of elements: ");
    scanf("%d", &size);

    printf("Enter array elements-\n");
    for (i = 0; i < size; i++)
        scanf("%d", &arr[i]);

    printf("\nEnter number to insert: ");
    scanf("%d", &num);
    printf("Enter position to insert element: ");
    scanf("%d", &pos);

    // check for invalid position
    if (pos < 0 || pos > size)
        printf("Invalid position");
    else
    {
        // shifting of elements
        for (i = size-1; i >= pos-1; i--)
            arr[i+1] = arr[i];
        
        arr[pos - 1] = num;
        size++;

        printf("Array after insertion-\n");
        for (i = 0; i < size; i++)
            printf("%d ", arr[i]);
    }
}

Output

Output

Enter number of elements: 5
Enter array elements-
2
3
6
4
5
Enter number to insert: 100
Enter position to insert element: 4
Array after insertion-
2 3 6 100 4 5