Bit Spreading Interleave Bits with Zeros

Code

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

uint16_t spread_bits(uint8_t val) {
    // Your logic here
    uint16_t reg = 0;

    for(uint8_t i=0; i<16; i++){
        uint8_t bit = (val >> i) & 1u ;
        reg |= (bit << (2*i));
    }
    return reg;
}

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

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

Solving Approach

leave by 2*i spaces and set them