Bit Spreading Interleave Bits with Zeros

Code

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

uint16_t spread_bits(uint8_t val) {
    uint16_t up = 0;
    uint16_t val16 = uint8_t(val);

    for (int i = 0; i < 8; i++) {
        up |= (val16 & (1 << i)) << i;
    }

    return up;
}

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

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

Solving Approach