Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    
    uint16_t last_highest_bit_pos = 0;

    for(uint8_t i=0;i<16;i++)
    {   
        // if bit is 1
        if(reg&(1<<i))
        {
            last_highest_bit_pos = i;
        }

    }

    if(reg==0)
    {
        return 0;
    }

    else
    return ((uint16_t)1<<last_highest_bit_pos);
}

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

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

Solving Approach