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 temp;
    uint16_t value = 0;
    for(int i=0;i<31;i=i+2){
        temp = (reg >> i) & 1;
        value = value | (temp<<(i/2)) ;  
    }
    return value;
}

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