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
    uint32_t reg1=0x00000000, check;
    for(uint8_t i=0; i<16; i++){
        check = (reg>>2*i)&1;
        (check == 1) ? (reg1|=(1<<i)) : (reg1 &= ~(1<<i));
    }
    return reg1;
}

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

Solving Approach