Extract Even Bits Only from 32-bit Register

Code

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

uint32_t extract_even_bits(uint32_t reg) {
    uint32_t ex_reg=0;
    for (int i=0; i < 32; i++) {
        ex_reg = ex_reg | ((reg >> i) & (1u << i)); 
    }
    // Your code here
    return ex_reg;
}

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

Solving Approach