22. Extract Even Bits Only from 32-bit Register

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

uint32_t extract_even_bits(uint32_t reg) {
    uint32_t da=0;
    reg&=~(2863311530);
    int nou=0;
    for(int i=0;i<32;i++)
    {
        if(((reg>>i)&1)==1)
        {
            da|=1<<nou;
            nou++;
        }
    }
    return da;
}

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

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