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 result = 0;
    for (int i = 0; i < 16; ++i) {
        // Extract bit at even position (2 * i)
        uint32_t bit = (reg >> (2 * i)) & 1;
        // Place it at position i in result
        result |= (bit << i);
    }
    return result;
}


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

Solving Approach