Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) 
{
    uint8_t i = 16;
    uint8_t pos = 0;
    while(i--)
    {
        if(reg & (1 << i))
        {
            pos = i;

            break;
        }
    }

    reg &= (1 << pos);

    return reg;
}

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

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

Solving Approach