120. Convert Integer to Hex String Without sprintf or itoa functions

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

void print_hex(uint16_t num) {
    // Your logic here
    
    char buffer[8];
    int i = 0;
     if(num == 0){
        printf("0");
        return ;
     }
    while(num > 0){
        char val = num % 16;
        if(val >= 10){
            buffer[i]= val + 'A' -10;
        }
        else if(val>= 0 & val<=9){
            buffer[i]=val +'0';
        }
        i++;
        num = num/16;
    }
    for(int j = i-1;j>=0;j--){
        printf("%c",buffer[j]);
    }

}

int main() {
    uint16_t num;
    scanf("%hu", &num);
    print_hex(num);
    return 0;
}