Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg)
{
    if (reg == 0) return 0;
    /*uint16_t counter = 0;


    while(reg != 0)
    {
        reg >>= 1;
        counter++;
    }

    uint16_t val = (1 << (counter-1));

    return val;
    */


    uint16_t comp = (1u << 15);

    while ((comp & reg) == 0)
    {
        comp >>= 1;
    }

    return comp;


}

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

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

Solving Approach