Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) 
{
    int lastset = 0;
    for(int i=0;i<16;i++)
    {
        uint16_t set = 1;
        set <<= i;
        if((reg & set) != 0)
        {
            lastset = i;
        }
    }
    if(lastset == 0)
    {
        return 0;
    }
    else
    {
       return (1 << lastset);
    }
}

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

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

Solving Approach