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

    // Generate mask
    uint8_t hsb_pos;
    for (uint8_t i = 0; i < 16; i++)
    {
        if ((reg >> i) & 0x1)
        {
            hsb_pos = i;
        }
    }
    uint16_t new_reg = 0;
    return (new_reg | (1 << hsb_pos));
}

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

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

Solving Approach