22. 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
    int x;
    int i;
    int y=0;
    for(i=30;i>=0;i=i-2)
    {  x=1<<i;
       x= x & reg;
       x=x>>i;
       y=y | x;
       y = y<<1;

    }
    y=y>>1;
    return y;
}

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