Extract Even Bits Only from 32-bit Register

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

uint32_t extract_even_bits(uint32_t reg) {
    uint32_t temp=0;
    for(int i=0;i<32;i=i+2){
        temp|=(reg&(1U<<i))>>(i/2);
    }
    return temp;
    
}

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