22. Extract Even Bits Only from 32-bit Register

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

uint32_t extract_even_bits(uint32_t reg) {
    // Your code here
    uint32_t newreg = 0x0;
    for(int i = 0; i < 16; i++){
        // if(reg & (1 << i*2)) newreg |= 1 << i;
        newreg |= ((reg & (1 << i*2))?1:0) << i;
        // printf("-> %u\n", newreg);
    }
    
    return newreg;
}

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