C Question

Q: int main() {   char arr[]  = "geeksforgeeks";   char *ptr  = arr;   while(*ptr != '\0')       ++*ptr++;   printf("%s %s", arr, ptr);   getchar();   return 0; }

Output:  hffltgpshfflt

Explanation:
The crust of this question lies in expression ++*ptr++.

If one knows the precedence and associativity of the operators then there is nothing much left. Below is the precedence of operators.

   Postfixx ++            left-to-right
   Prefix  ++             right-to-left
   Dereference *          right-to-left

Therefore the expression ++*ptr++ has following effect
Value of *ptr is incremented
Value of ptr is incremented