Binary Search in Sorted Array

Code

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

int binary_search(uint8_t *arr, uint8_t n, uint8_t key) {
    int end = (n-1);
    int start = 0;
    while (start <= end) {
        int middle = (start + end) / 2;
        
        if (arr[middle] > key) {
            end = middle - 1;
        } else if (arr[middle] < key) {
            start = middle + 1;
        } else if (arr[middle] == key) {
            return middle;
        }
    }

    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