Basic C Programming008

If a four digit number is input through the keyboard, write a program to obtain the sum of first and last of this number. 

#include <stdio.h>
#include <conio.h>
void main ( )
{
          int       num, p, sum = 0;
          clrscr ( );
                               
          printf ("\n\n\n\t Enter a four digit number...:"); scanf ("%d",&num);
                          
          p = num / 1000;                  /* first digit */
          sum = sum + p;                   /* sum updated with addition of first digit */
          p = num % 10;                    /* last digit */
          sum = sum + p;                   /* sum updated with addition of last digit */
                                           
          printf ("\n\n\n\t Sum of first and last digit of %d is...:%d",num, sum);
          getch ( );
}

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