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 highsetbit = 1;
    highsetbit <<= 15;
    for(int i=0;i<16;i++)
    {
        if((reg & highsetbit)!= 0)
        {
            return highsetbit;
            break;
        }
        highsetbit >>= 1;
    }
}

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

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

Solving Approach