Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    uint16_t mask = 0b1000000000000000;
    int16_t i=15;
    while(i>=0)
    {
        if(reg & mask) return reg & mask;
        i++,mask>>=1;
    }
    return reg & mask;
}

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

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

Solving Approach