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) {
   if(num==0)
   printf("%d",0);
    if(base==2){
         int start=0;
        for(int i=7;i>=0;i--){
        int bit=(num>>i)&1;
         if(bit)
        start=1;
        if(start)
        printf("%d",bit);
        }
    }
    else{
        
        printf("%X",num);
    }
}

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

    print_base(num, base);
    return 0;
}

Solving Approach