Convert Decimal Number to Binary or Hex Without itoa function

Code

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

void print_base(uint16_t num, uint8_t base) {
    // Your logic here
    uint8_t buffer[16],i=0;
    if(num == 0) 
    {
        printf("%d",num);
        return;
    }
    while(num>0)
    {
        buffer[i++] = num%base;
        num/=base;
    }
    for(int j=i-1;j>=0;j--)
    {
        if(buffer[j] < 10)
            putchar( '0'+ buffer[j]);
        else
            putchar('A' + (buffer[j] - 10));
    }
       
}

int main() {
    uint16_t num;
    uint8_t base;
    scanf("%hu %hhu", &num, &base);

    print_base(num, base);
    return 0;
}

Solving Approach