Keep Only the Highest Set Bit

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    int i = 16;
    for(i = 16;i>0;i--)
    {
        if((reg&(1<<i))!=0)
        {
            return (reg&(1<<i));
        }
        else
        {
            //do nothing
        }
    }
    return 0;
}

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

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