Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    // Your logic here
    uint16_t res, dummy;
    int position;
    dummy = reg;

    if (reg == 0){
        position = -1;
        res = 0;
    }
    else{
        while(reg > 1){
            reg >>= 1;
            position++;
        }
        res = dummy & (1 << position);
    }
    return res;
}

int main() {
    uint16_t reg;
    scanf("%hu", &reg);

    uint16_t result = highest_set_bit(reg);
    printf("%hu", result);
    return 0;
}

Solving Approach