22. Extract Even Bits Only from 32-bit Register

#include <stdio.h>
#include <stdint.h>
int mark;
 uint32_t haha = 0;
 int hihi =0;
uint32_t extract_even_bits(uint32_t reg) {
  for(int i =0; i<= 31; i = i +2)
  {
    mark = (reg >> i) & (1 << 0);
     haha += (mark << hihi);
     hihi++;
         
  }
  return haha;


    
    
}

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