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

    if (reg == 0 ) return 0;

    for (uint8_t i = 0 ; i < 16 ; i++) {
        if ((reg << i) & (1 << 15)) {
            return (1 << 15-i);
        }
    }
}

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

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

Solving Approach