Keep Only the Highest Set Bit

Code

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

uint16_t highest_set_bit(uint16_t reg) {
    if (reg == 0) return 0;  
    uint16_t result = 1 << 15;  
    while ((reg & result) == 0) {
        result >>= 1;  
    }
    return result;
}

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

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

Solving Approach