Bit Spreading Interleave Bits with Zeros

Code

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

#define mask 0x01

uint16_t spread_bits(uint8_t val) {
    // Your logic here
    uint16_t reg = 0;
    for(int bit = 7; bit >= 0; bit--){
        reg <<= 2;
        reg |= (val >> bit) & mask;
    }
    return reg;
}

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

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

Solving Approach