Keep Only the Highest Set Bit

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    // Your logic here
    if(reg==0) return 0;
    int pos=15;
    int f=1;
    while(f==1){
        int mask=(1<<pos);
        if(mask&reg){
            f=0;
            return (pow(2,pos));
        }
        else pos--;
    }
    
}

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

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