Bit Spreading Interleave Bits with Zeros

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

uint16_t spread_bits(uint8_t val) {
    uint16_t temp = 0;  
    for(int i = 7 ; i >= 0 ;i--){
    uint8_t a = ((val >> i )& 1);
        temp |=( a << (i*2) );
    }
    return temp;
}

int main() {
    uint8_t val;
    scanf("%hhu", &val);
    uint16_t result = spread_bits(val);
    printf("%u", result);
    return 0;
}