Extract Even Bits Only from 32-bit Register

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

uint32_t extract_even_bits(uint32_t reg) {
     uint32_t hehe=0;
    for (int i=0;i<32;i++)
    {
       
        if(i%2==0)

        {
            uint32_t mask = reg &0x01;
            hehe|=mask<<i/2;
        }

         reg =reg>>1;
                   
    }
    return hehe;
    
}

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