22. Extract Even Bits Only from 32-bit Register

#include <stdio.h>
#include <stdint.h>
#include<math.h>
uint32_t extract_even_bits(uint32_t reg) {
    // Your code here
    int c=0,k=0;
    uint32_t reg2=0;
    while(reg)
    {
      if(reg%2==1&&c%2==0)
      {
        reg2+=pow(2,k);
        k++;
      }
      c++;
      reg/=2;
    }
    return reg2;
}

int main() {
    uint32_t reg;
    scanf("%u", &reg);
    printf("%u", extract_even_bits(reg));
    return 0;
}