Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    // Your logic here
    uint16_t n=0;
    if(reg!=0){
        for (int i=0;i< 16;i++){
            if((reg&(1<<i))!=0){
                n=i;
            }
        }
        return(1<<n);
    }
    else{
        return n;
    }
}
int main() {
    uint16_t reg;
    scanf("%hu", &reg);

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

Solving Approach