C program to remove duplicate elements in an array

Below is the program to remove duplicate elements in an array.

#include <stdio.h>
int main() {
    int n,i,j,k;
    printf("Enter how many numbers do you want to enter:");
    scanf("%d",&n);
    int arr[n];
    printf("Enter elements: ");
    for(i=0;i<n;i++){
        scanf("%d",&arr[i]);
    }
    printf("Elements in the array are:\n");
    for(i=0;i<n;i++){
        printf("%d\n",arr[i]);
    }
    for(i=0;i<n;i++){
        for(j=i+1;j<n;j++){
            if(arr[i]==arr[j]){
                for(k=j; k<n; k++){
                    arr[k]=arr[k+1];
                }
                n--;
                j--;
            }
        }
    }
    printf("Elements in the array are:\n");
    for(i=0;i<n;i++){
        printf("%d\n",arr[i]);
    }
}

Output:

Enter how many numbers do you want to enter:8
Enter elements: 7
5
9
3
2
5
7
9
Elements in the array are:
7
5
9
3
2
5
7
9
Elements in the array are:
7
5
9
3
2