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 retVal = 0;
    for (uint8_t idx = 0u; idx <  16u; idx++)
    {
        if (1 == (reg >> (16 - 1 - idx) & 1u))
        {
            retVal = (1 << (16 - 1 - idx));
            break;
        }
    }
    return retVal;
}

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

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

Solving Approach