Keep Only the Highest Set Bit

Code

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

// Function to find the highest set bit
uint16_t highest_set_bit(uint16_t reg) {
    if (reg == 0)
        return 0;

    uint16_t bit = 1 << 15; // Start from the highest bit
    while (bit > 0) {
        if (reg & bit)
            return bit;
        bit >>= 1;
    }
    return 0;
}

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

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

Solving Approach