Extract Even Bits Only from 32-bit Register

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

uint32_t extract_even_bits(uint32_t reg) 
{
    // Your code here
    uint16_t result = 0;
    int i = 0;
    uint8_t mask  = 0;
    for(i = 0; i < 16;i++)
    {
        mask = (reg & 0x01);
        result = result | (mask << i );
       reg = reg >> 2;
    }
    return result;
    
    
}

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