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 reg_result = 0;
    int n = 15;
    if(reg == 0) return 0;
    while((reg & (1 << 15)) == 0)
    {   
        reg = reg << 1;
        n--;
    }
    reg_result |= 1 << n;
    return reg_result;
}

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

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

Solving Approach