C Programming - Pointers - Discussion

#include<stdio.h>

int main()
{
    int a = 10, b = 10;
    int c,d;
    int *ptra = &a;
    int *ptrb = &b;

    ++*ptra;
    (*ptrb)++;

    printf("\n A = %d , B = %d", a , b);

    c = ++*ptra;
    d = (*ptrb)++;

    printf("\n A = %d , B = %d", a , b);
    printf("\n C = %d , D = %d", c , d);

    return 0;
}

/* Output:

 A = 11 , B = 11
 A = 12 , B = 12
 C = 12 , D = 11
*/