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 
    // My own approach
    uint8_t count = 0;
    for(uint8_t i = 0; i < 16; i++)
    {
        if((reg & (1<<15))==0)
        {
            count++;
        }
        else
        {
            break;
        }
        reg = (reg << 1);
    }
    reg = 0;
    reg = (1<<(15-count));
    return reg;
}

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

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

// Below is AI generated
// uint16_t highest_set_bit(uint16_t reg)
// {
//     if (reg == 0)
//         return 0;

//     reg |= reg >> 1;
//     reg |= reg >> 2;
//     reg |= reg >> 4;
//     reg |= reg >> 8;

//     return reg & ~(reg >> 1);
// }

Solving Approach

This is not the best i would say, but i did it without using AI