Keep Only the Highest Set Bit

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    if (reg ==0) return 0;
    else{
   for(int i=0;i<15;i++)
   {
   if((reg & 1<<(15-i)))
   {
        return reg = (1<<15-i);
   }
   }}
}

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

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