Keep Only the Highest Set Bit

Code

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


uint16_t highest_set_bit(uint16_t reg) {
    int n=0;
    int i=0;
    if(reg==0) return 0;
    while(n<16)
    {
        if((reg>>n)&1 ==1) i=n;
        n++;
    }
    reg=(1<<i);
    return reg;
}

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

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

Solving Approach