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 tmp = reg;
    uint8_t i = 0;
    if (reg) {
        while(tmp) {
        tmp = (tmp >> 1);
        i++;
        }
        return (reg & (1UL << (i-1)));

    } else
    return 0;
}

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

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

Solving Approach