Binary Search in Sorted Array

#include <stdio.h>
#include <stdint.h>

int binary_search(uint8_t *arr, uint8_t n, uint8_t key) {
    // Your logic here
    int left =0, right = n-1;
    while(left <= right)
    {
        int middle = left + (right - left)/2;
        if(key == arr[middle])
        {
            return middle;
        }
        else if ( key < arr[middle]) 
        {
            right = middle - 1;
        }
        else 
        {
            left = middle+1;
        }
    }
    return -1;
}

int main() {
    uint8_t n, key;
    scanf("%hhu", &n);
    uint8_t arr[100];

    for (uint8_t i = 0; i < n; i++) {
        scanf("%hhu", &arr[i]);
    }
    scanf("%hhu", &key);

    int index = binary_search(arr, n, key);
    printf("%d", index);
    return 0;
}