Convert Integer to Hex String Without sprintf or itoa functions

Code

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

void print_hex(uint16_t num) {
    // Your logic here
    char digits[16];
    int i = 0;
    int rem =0;
    if(num ==0)
    {
        printf("0");
    }
    while(num!=0)
    {
        rem = num % 16;
        if(rem >=10)
        {
            digits[i++] = 'A' + rem - 10;
        }
        else
        {
            digits[i++] = rem +'0';
        }
        num = num /16;
    }
    while(i>0)
    {
        printf("%c",digits[--i]);
    }
}

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

Solving Approach