Keep Only the Highest Set Bit

Code

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

// Complete the function
uint16_t highest_set_bit(uint16_t reg) {
    int c=0;
    int pos;
    for(int i=0;i<=15;i++){
      c=reg>>i&1;
      if(c==1)
      pos=i; 
    }
    return reg=reg&1<<pos;
}

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

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

Solving Approach