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 v=0x8000;
    int i=0;
    do{
        if(reg & v){
            reg=v;
            i=1;}
        else if(reg==0){
           reg=0;
            i=1; 
        }
        v=(v>>1);}
    while(i!=1);
    
    return reg;
}

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

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

Solving Approach