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 here 
    if (reg ==0)
        return 0;
    uint16_t mask =1 ; 
   while (reg > 1){
    reg >>= 1;
    mask <<= 1;
   }
    return mask ;

}

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

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