Extract Even Bits Only from 32-bit Register

Code

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

uint32_t extract_even_bits(uint32_t reg) {
    int x=reg&0x55555555;
        x=(x|(x>>1))&0x33333333;
             x=(x|(x>>2))&0x0f0f0f0f;
                   x=(x|(x>>4))&0x00ff00ff;
                         x=(x|(x>>8))&0x0000ffff;
                               
                                   
                                       return x;
}

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

Solving Approach