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
    int i,max;
    for(i=0; i<(8*sizeof(uint16_t)); i++){
        if((reg>>i)&1){
            max = i;
        }
    }
    return (reg & (1<<max));
}

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

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