Bit Spreading Interleave Bits with Zeros

Code

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

uint16_t spread_bits(uint8_t val) {
    uint16_t insert = 0;
    for(int i=0;i<8;i++)
    {
        uint16_t extract = 1;
        extract = (extract << i) & val;
        insert = insert | (extract << ((i*2)-i));
    } 
    return insert;
}

int main() {
    uint8_t val;
    scanf("%hhu", &val);

    uint16_t result = spread_bits(val);
    printf("%u", result);
    return 0;
}

Solving Approach