Write a C program to display the digits of a number as pyramid

(i)    Given an integer number, write a program that displays the number as follows :

First Line       : all digits
Second Line   : all excepts first digits
Third Line      : all excepts first two digits
………..
Last Line        : the last digit.
For example, the number 5678 will be displayed as :

5         6          7          8
6         7          8
7         8
8

Solution: 
#include<stdio.h>
int main(){
int x,arr[16],i=0,j;
printf("Enter the integer value: ");
scanf("%d",&x);
while(x > 0){
arr[i]= x % 10;
x = x / 10;
i++;
}
for(j=i-1; j >= 0; j--){
for(i=j; i>=0;i--){
printf("%d ",arr[i]);
}
printf("\n");
}
return 0;
}