Extract Even Bits Only from 32-bit Register

Code

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

uint32_t extract_even_bits(uint32_t reg) {
    // Your code here

    uint8_t bit;
    uint32_t outputreg = 0;
    for (int i = 0; i < 16; i++){
        // extract each even-indexed bit from reg:
        bit = (reg >> (2*i)) & 1u;
        // set this bit in consecutive positions in a new register:
        outputreg |= (bit << i);
    }
    return outputreg;
}

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

Solving Approach