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
    uint16_t temp=0,pos;
    uint8_t a;
    for (int i=0;i<=32;i++){
        temp|=(1&(reg>>(2*i)))<<pos;
        pos++;
    }
    return temp;
}

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

Solving Approach