Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    if (reg == 0) return 0;
    
    for (int8_t i = 15; i >= 0; i--) {
        if ((reg & (1 << i)) != 0) {
            return (1 << i);  // Return the value with only the highest bit set
        }
    }
    return 0;  // No bits set
}

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

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

Solving Approach