Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    uint16_t cmp = 1u << 15;

    while(cmp)
    {
        if(reg & cmp)
        {
            return cmp;
        }
        else
        {
            cmp >>= 1;
        }
    }

    return 0;
}

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

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

Solving Approach