Keep Only the Highest Set Bit

Code

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


uint16_t highest_set_bit(uint16_t reg) {
   uint8_t i=0;
   if(reg==0)return 0;
   while(1){
      if(reg&(1<<(15-i)))
      return reg&(1<<(15-i));

      i++;
   }
   
}

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

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

Solving Approach