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 out_reg = 0;
    for(uint8_t i=0; i<15; i++)
    {
        if((reg >> (15-i)) & 0x1)
           return out_reg |= (1 << (15-i));
    }

    return out_reg;
}

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

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

Solving Approach