Keep Only the Highest Set Bit

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) 
{
    // Your logic here1
   uint8_t  pos = 16;
  
   unsigned char  set_flag = 0;
   while(pos>0)
   {
        if(reg & (1<<pos))
        {
            // set_flag = 1;
            // if(set_flag)
            // {
            //     pos_1 = pos;
            //     reg = reg << 1;
            //     reg &= ~(0x00);
            //     reg |= (1<<pos_1);
                
                return (1<<pos);
            
            
            
        }
        pos = pos - 1;
   }
   

    return 0;
}

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

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