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;
   }
    uint16_t pos = 1 << 15;
    while ((reg & pos) == 0) pos >>= 1;
    return pos;
}

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

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

Solving Approach