delete a number in array in c

1for (int i =  pos; i < size; i++)
2{
3    arr[i-1]= arr[i];
4        
5}

1void remove_element(array_type *array, int index, int array_length)
2{
3   int i;
4   for(i = index; i < array_length - 1; i++) array[i] = array[i + 1];
5}
6

1#include<stdio.h>
2
3void main()
4{
5    int a[10], del_num, i, n, pos;
6
7
8    printf("Enter number of elements in array: ");
9    scanf("%d", &n);
10
11    for(i = 0; i < n; i++)
12    {
13        printf("Enter %d number: ",i+1);
14        scanf("%d", &a[i]);
15    }
16
17    printf("\n\nThe input array is: ");
18
19    for(i = 0; i < n; i++)
20    {
21         printf("%d ", a[i]);
22    }
23
24
25    printf("\n\nEnter the number to be deleted: ");
26    scanf("%d", &del_num);
27
28
29    for(i = 0; i < n; i++)
30    {
31        if(a[i] == del_num)
32        {
33            a[i]=0;
34
35        }
36    }
37
38    printf("\n\nResultant array is: ");
39
40    for(i = 0; i < n; i++)
41    {
42        printf("%d  ",a[i]);
43    }
44}
45