Extract Even Bits Only from 32-bit Register

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

uint32_t extract_even_bits(uint32_t reg) {
    uint8_t get_bit = 0;
    uint32_t output = 0;
    for(int i = 0; i < 31; i+=2 )
    {
        get_bit = (reg >> i) & 1;
        output |= get_bit << i/2;
    }
    return output;
    // Your code here
    
}

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