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 max_i = 0;
    for(int i = 0; i<16; i++)
    {
        if(reg & (1 << i))
        {
            max_i = i;
        }
    }
    reg &= 0x00;
    if(max_i == 0)
    {
        return 0;
    }
    else
    {    
        reg |= (1<<max_i);
    }
    return reg; 
}

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

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

Solving Approach