Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {

    if(reg==0)
    {
        return 0;
    }
    
    //register 16 bit (need highest bit so start from MSB)
    uint16_t mask = (1<<15) ;

    //checking if bit is set return vlaue
    while((reg & mask)==0)
    {
        mask = mask >>1 ;
    }
    return mask ;
}

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

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

Solving Approach