22. Extract Even Bits Only from 32-bit Register

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

uint32_t extract_even_bits(uint32_t reg) {
    uint32_t new_reg = 0;
    int j = 0;
    for(uint32_t i=0; i< 32; i++) {
        if((i%2) == 0) {
            int val = (reg >> i) & 1;
            new_reg |= (val << j);
            j++;
        }
    }
    return new_reg;
    
}

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