Group and frequency.c

//Group and frequency question, input restricted between 0 and 100 and it automatically takes random input
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

typedef unsigned int    UINT;

int main() {
    UINT arr[99] = { 0 }, aSize = 0;
    UINT sort[11] = { 0 }, sSize = 11;
    srand((UINT)time(NULL));
    {   //Init ---IGNORE---
        aSize = 20;
        for (int i = 0; i < aSize; i++) {
            arr[i] = rand() % 100;
        }
    }

    printf("Elements: ");
    for (int i = 0; i < aSize; i++) {
        printf("%d, ", arr[i]);
    }

    for (int i = 0; i < aSize; i++) {
        sort[arr[i] / 10]++;
    }

    printf("\n\n      range\t\tFrequency");

    for (int i = 0; i < sSize; i++) {
        printf("\n  %d\tto\t%d\t    %d", i * 10, i * 10 + ((i == 10) ? 0 : 9), sort[i]);
    }

    return 0;
}