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 bit = 1;
    uint8_t index=0;
    for(uint8_t i = 0; i < 16 ; i++)
    {
        if((reg>>i & 1) == 1)
        {
            index = i;
        }
    }

    for(uint8_t i = 0; i <index;i++)
    {
        reg &= ~(bit<<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