conversion between decimal and octal

#include<stdio.h>
int main()
//conversion between decimal and octal
{

   int num;
   printf("Enter any Decimal number : \n");
   scanf(" %d",&num);
   printf("Octal number: %o",num);/*The octal numeral system, or oct for short,
is the base-8 number system, and uses the digits 0 to 7.*/
   getch();
    return 0;

}