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
    char arr[33];
    int i=0;
    while(true){
        uint8_t rem=num%base;
        //printf("%d ",rem);
        if(rem<10){
            arr[i]='0'+rem;
            //printf("%c",arr[i]);
        }
        else{
            arr[i]='A'+(rem-10);
            //printf("%c",arr[i]);
        }
        num/=base;
        if(num==0){
            break;
        }
        i++;
    }
    for(int i1=i;i1>=0;i1--){
        printf("%c",arr[i1]);
    }
}

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

    print_base(num, base);
    return 0;
}

Solving Approach