Keep Only the Highest Set Bit

Code

#include <stdio.h>
#include <stdint.h>
// Complete the function
uint16_t highest_set_bit(uint16_t reg) 
{
    int pos=15;
    if(reg==0)
    return 0;
    
    while(pos>=0)
    {
        if(reg&(1<<pos))
           return (1<<pos);
        pos--;
    }
    return 0;
}
int main() {
    uint16_t reg;
    scanf("%hu", &reg);
    uint16_t result = highest_set_bit(reg);
    printf("%hu", result);
    return 0;
}

Solving Approach