Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    if(reg==0)
    {return 0;}
    else
    {
    uint8_t pos;
    for(uint8_t i=0;i<16;i++)
    {

        if(reg&(1U<<i))
        {
            pos=i;
        }
    }
    reg&=0;
    reg|=(1U<<pos);// Your logic here
    return reg;
    }
}

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

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

Solving Approach