Bit Spreading Interleave Bits with Zeros

Code

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

uint16_t temp;
uint16_t spread_bits(uint8_t val) {
    uint8_t j = 0;
    for(uint8_t i = 0; i < 16; i+=2){
        uint8_t temp1 = ((val >> j) & 0x1);
        temp |= (temp1 << i);
        j++;
    }
    return temp;
}

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

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

Solving Approach