Binary Search in Sorted Array

Code

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

int binary_search(uint8_t *arr, uint8_t n, uint8_t key) {
    uint8_t low = 0; uint8_t high = n-1;
    while ( low <= high)
    {
        uint8_t mid = (high + low)/2;
        if (*(arr+mid)== key)
        {
            return mid;
        }
        else if (key < *(arr+mid))
        {
            high = mid -1;
        }
        else if (key > *(arr+mid))
        {
            low = mid + 1;
        }
        else 
        {
            return -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;
}

Solving Approach