Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    // Your logic here
    if (reg == 0) {
        return 0;
    }
    else {
        uint16_t mask = (1 << 15);
        while ((reg & mask) == 0) {
            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