Decimal to Hexadecimal Conversion in C

#include<stdio.h>

void convert (int num)
{
  // creating a char array to store hexadecimal equivalent
  char hexa[100];

  // using i to store hexadecimal bit at given array position
  int i = 0;
  while (num != 0)
    {
      int rem = 0;


      rem = num % 16;

      // check if rem < 10 : Digits : 0 - 9
      // ascii 0 : 48
      if (rem < 10) { hexa[i] = rem + 48; i++; } 
// else positional values : A - F 
// rem value will be > 10, adding 55 will result : A - F 
// ascii A : 65, B : 66 ..... F : 70 
      else
	{
	  hexa[i] = rem + 55;
	  i++;
	}
      num = num / 16;
    }
// printing hexadecimal array in reverse order
printf ("Hexadecimal:");
  for (int j = i- 1; j >= 0; j--)
    printf ("%c" , hexa[j]);
}

int main ()
{
  int decimal = 1457;
  convert (decimal);
  return 0;
}